Question

a wheel of diameter 54 cm is making 35 revolution in 12 second. Find the speed in km/h​

Answer 1

Answer:

Since the diameter of the wheel is 56cm, its radius is 28cm.

In one revolution, the wheel covers the distance of one circumference.

Circumference of the wheel =2πr=2×

7

22

×28=176cm

Since the wheel makes 45 revolutions in 10 seconds, it makes

10

45

revolutions in one second.

Total distance covered in one second = No. of revolutions in one second

× circumference =

10

45

×176=792 cm/s

cm/s can be converted to km/hr using the formula cm/s ×

500

18

= km\hr

Now 792×

500

18

=28.512 km/hr