Question

wheel makes 48 revolutions in 3 seconds how many revolutions does it make in 30 seconds

Answer 1

3 sec- 48 revolutions
1 sec- 48/3=16 revolutions
30 sec- 16*30=480

ANS- Wheel will make 480 revolutions in 30 seconds

Answer 2

A wheel makes ,
48 revolutions - 3 seconds.
x ?                   - 30 seconds
x=30*48/3 = 48*10= 480 revolutions.
Therefore, the wheel makes 480 revolutions in 30 seconds.