Question

A.CHild jumping rope can jump at a speed of 280 revolutions every two minutes what is the number of revolutions the child can jump in 3.5 minutes

Answer 1

the number of revolutions the child can jump in 3.5 minutes is 490 .

Explanation:

Here we have , A child jumping rope can jump at a speed of 280 revolutions every two minutes . We need to find what is the number of revolutions the child can jump in 3.5 minutes . Let's find out:

According to question , A child jumping rope can jump at a speed of 280 revolutions every two minutes , So in one minute Number of revolutions is :

⇒
`(280)/(2)`

⇒
`(140(2))/(2)`

⇒
`140`

Now , the number of revolutions the child can jump in 3.5 minutes :

⇒
`140(3.5)`

⇒
`490`

Therefore , the number of revolutions the child can jump in 3.5 minutes is 490 .