Question

A foot ball field measures 100m by 72m. A school marks a football field similar in shape to a fullsize football field but only 30m long. What is its width?

Answer 1

Answer: 21.6 m

Explanation:

Given

A football field measures
`100\ m* 72\ m`

If a football field similar in shape to a full size has a length
`l=30\ m`

The ratio of the length of the original to the small field is the same

Assume the width of the small field is w

`\therefore (100)/(30)=(72)/(w)\\\\\Rightarrow w=30* (72)/(100)\\\\\Rightarrow w=21.6\ m`

Thus, the width of the field is 21.6 m