Answer:
Step-by-step explanation:
Alright, lets get started.
A water wheel makes revolutions 28 in 90 seconds.
We are asked to find number of revolutions in 4 minutes.
lets make 4 minutes into seconds
4 minutes = \(4*60=240 seconds\)
In 90 seconds, the revolutions are = 28
So, in 1 second, the revolutions are = \(\frac{28}{90}\)
So, in 240 seconds, the revolutions are = \(\frac{28}{90}*240\)
So the revolutions are = 74.67 revolutions
It means, in 4 minutes, the numbers of revolutions are 74.67 . : Answer
Hope it will help :)
