7th Class Mathematics Comparing Quantities

  • question_answer 2) In a computer lab, there are 3 computers for every 6 students. How many computers will be needed for 24 students?

    Answer:

                    Let \[x\] computers be needed for 24 students. Then,       \[3:x=6:24\] \[\Rightarrow \]               \[\frac{3}{x}=\frac{6}{24}\] \[\Rightarrow \]               \[6x=24\times 3\] \[\Rightarrow \]                               \[6x=72\] \[\Rightarrow \]                               \[x=\frac{72}{6}\] \[\Rightarrow \]                               \[x=12\] Hence, 12 computers will be needed for 24 students. Aliter: \[\because \]     For every 6 students are there \[=\text{3}\] computers \[\therefore \]  For 1 student is there \[=\frac{3}{6}\] computer \[\therefore \]  For 24 students are there \[=\frac{3}{6}\times 24\] computers = 12 computer Hence, 12 computers are needed for 24 students.

More Questions

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

adversite


You need to login to perform this action.
You will be redirected in 3 sec spinner