Question

A wheel makes 4 19/20 revolutions per minute. If it rotates for 95 minuets, how many revolutions does it makes?

Answer 1

Let's observe:

In one minute the wheel makes 4 19/20 revolutions

So,

4 19/20 revolutions ----------------- 1 minute

How many it will do in 95 minutes?

4 . 19/20 revolutions ------------------ 1 minute

x revolutions ------------------------------ 95 minutes

Multiply this

4 . 19/20 . 95 = 1 . x

19/5 . 95 = 1.x

19 . 19 = 1.x

19² = x

x = 361

So, it makes 361 revolutions in 95 minutes