question_answer

A carpet is laid on the floor of a room 3 8 m by 5 m, leaving a border 0.5 m wide all round it. What is the perimeter of the carpet?

A)  22 m

B)  24 m

C)  26 m

D)  28 m

Correct Answer: B

Solution :

  Length of carpet \[=[8-(0.5\times 2)]m\] \[=(8-1)\,m=7\,m\] Breadth of carpet \[=[5-(0.5\times 2)]\,m\]                         \[=(5-1)\,m=4\,m\] So, perimeter of carpet = 2(Length + Breadth)                         \[=2(7+4)m\]                         \[=2\times 11\,m=22\,m\]