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 .

Step-by-step 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 :

⇒ $\frac{280}{2}$

⇒ $\frac{140(2)}{2}$

⇒ $140$

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 .