-
View Answer play_arrow
-
The lid of a rectangular box of sides 40 cm by 10 cm is sealed all round with tape. What is the length of tape required?
View Answer play_arrow
-
A table-top measures 2 m 25 cm by 1 m 50 cm. What is the perimeter of the table-top? TIPS Firstly, change all the units in same unit and then find perimeter by using 2 (length + breadth),
View Answer play_arrow
-
What is the length of the wooden strip required to frame a photograph of length and breadth 32 cm and 21 cm respectively?
View Answer play_arrow
-
A rectangular piece of land measures 0.7 km by 0.5 km. Each side is to be fenced with 4 rows of wires. What is the length of the wire needed? TIPS Firstly, find the perimeter of rectangular piece of land and then multiply by 4 to find the length of wire.
View Answer play_arrow
-
Page No. 213 Find the perimeter of each of the following shapes. (a) A triangle of sides 3 cm, 4 cm and 5 cm. (b) An equilateral triangle of side 9 cm. (c) An isosceles triangle with equal sides 8 cm each and third side 6 cm.
View Answer play_arrow
-
Find the perimeter of a triangle with sides measuring 10 cm, 14 cm and 15 cm.
View Answer play_arrow
-
Find the perimeter of a regular hexagon with each side measuring 8 m.
View Answer play_arrow
-
Find the side of the square whose perimeter is 20 m.
View Answer play_arrow
-
The perimeter of a regular pentagon is 100 cm. How long is its each side?
View Answer play_arrow
-
A piece of string is 30 cm long. What will be the length of each side, if the string is used to form (a) a square? (b) an equilateral triangle? (c) a regular hexagon? TIPS Here, perimeter of each figure will be equal to length of string i.e. 30 cm. Also, perimeter = Sum of all sides of a figure, since each figure has all sides equal, so to find a side of a figure, divide its perimeter by number of sides.
View Answer play_arrow
-
Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is its third side?
View Answer play_arrow
-
Find the cost of fencing a square park of side 250 m at the rate of ` 20 per metre. TIPS To find the cost of fencing, multiply the perimeter of square (\[4\times \] length of side) by rate of fencing.
View Answer play_arrow
-
Find the cost of fencing a rectangular park of length 175 m and breadth 125 m at the rate of ` 12 per metre. TIPS To find the cost of fencing a rectangular park, multiply its perimeter [2 (length + Breadth)] by rate of fencing.
View Answer play_arrow
-
Sweety runs around a square park of side 75 m. Bulbul runs around a rectangular park with length 60 m and breadth 45 m. Who covers less distance?
View Answer play_arrow
-
What is the perimeter of each of the following figures? What do you infer from the answers? (a)
(b)
(c)
(d)
-
Avneet buys 9 square paving slabs, each with a side of \[\frac{1}{2}m.\] He lays them in the form of a square.
(a) What is the perimeter of his arrangement in the figure (i)? (b) Shari does not like his arrangement. She gets him to lay them out like a cross. What is the perimeter of her arrangement in the figure (ii)? (c) Which has greater perimeter? (d) Avneet wonders, if there is a way of getting an even greater perimeter. Can you find a way of doing this? (The paving slabs must meet along complete edges i.e. they cannot be broken.)
-
Find the areas of the following figures by counting square.
-
Find the areas of the rectangles whose sides are (a) 3 cm and 4 cm (b) 2 m and 21 m (c) 2 km and 3 km (d) 2 m and 70 cm TIPS If the length and breadth of a rectangle are given, then Area of rectangle = Length \[\times \] Breadth.
View Answer play_arrow
-
Find the areas of the squares whose sides are (a) 10 cm (b) 14 cm (c) 5 cm TIPS If the side of a square is given, then Area of a square = Sidex Side.
View Answer play_arrow
-
The length and breadth of three rectangles are as given below (a) 9 m and 6m (b) 17 m and 3 m (c) 4 m and 14 m Which one has the largest area and which one has the smallest?
View Answer play_arrow
-
The area of a rectangular garden 50 m long is 300 sq m. Find the width of the garden.
View Answer play_arrow
-
What is the cost of tiling a rectangular plot of land 500 m long and 200 m wide at the rate of ` 8 per hundred sq m? TIPS Firstly, find the area of a rectangular plot. Then, to find the required cost, multiply the area by rate of tiling i.e.\[\frac{8}{100}.\] [\[\because \]rate = ` 8 per hundred sq m]
View Answer play_arrow
-
A table-top measures 2 m by 1m 50 cm. What is its area in square metres? TIPS Firstly, convert the measures in same unit say m using decimals. Then, Area of table-top = Length \[\times \] Breadth.
View Answer play_arrow
-
A room is 4 m long and 3 m 50 cm wide. How many square metres of carpet is needed to cover the floor of the room?
View Answer play_arrow
-
A floor is 5 m long and 4 m wide. A square carpet of sides 3 m is laid on the floor. Find the area of the floor that is not carpeted. TIPS Firstly, find the area of rectangular floor and square carpet separately. Then, the area of required floor will be obtained by subtracting area of carpet from area of floor.
View Answer play_arrow
-
Five square flower beds each of sides 1 m are dug on a piece of land 5 m long and 4 m wide. What is the area of the remaining part of the land? TIPS Firstly, find the area of five square flower beds and piece of land separately. Then, area of the remaining part of the land will be obtained by subtracting the area of five beds from area of land.
View Answer play_arrow
-
By splitting the following figures into rectangles, find their areas (the measures are given in centimeters).
-
Split the following shapes into rectangles and find their areas (The measures are given in centimeters).
-
How many tiles whose length and breadth are 12 cm and 5 cm respectively will be needed to fit in a rectangular region whose length and breadth are respectively. (a) 100 cm and 144 cm (b) 70 cm and 36 cm Firstly, find the area of one tile and rectangular region separately. Then Area of rectangular region Required number of tiles \[=\frac{\text{Area}\,\text{of}\,\text{rectangular}\,\text{region}}{\text{Area}\,\text{of}\,\text{one}\,\text{tile}}\]
View Answer play_arrow
-
Split the following shapes into rectangles and find their areas (The measures are given in centimeters).
-
How many tiles whose length and breadth are 12 cm and 5 cm respectively will be needed to fit in a rectangular region whose length and breadth are respectively. (a) 100 cm and 144 cm (b) 70 cm and 36 cm Firstly, find the area of one tile and rectangular region separately. Then Area of rectangular region Required number of tiles \[=\frac{\text{Area}\,\text{of}\,\text{rectangular}\,\text{region}}{\text{Area}\,\text{of}\,\text{one}\,\text{tile}}\]
View Answer play_arrow
TIPS Perimeter is the distance covered along the boundary forming a closed figure when we go round the figure once. So, to find perimeter, add the length of all sides (which are line segments) of the given figure. 
