M
4. The wheels ofa car are of diam eter 80 cm each. How many complete
each wheel make in 10 minutes when the car is travelling at a speed of 66
many complete revolutions
a speed of 66 km per hour?
Answers
Answered by
4
diameter of wheel = 80 cm
radius = 80/2 = 40 cm
Circumference = 2 π r
=> 2× 22 / 7 × 40
=> 44 × 40 / 7
=> 1760/7 cm
speed = 66km/h
time = 10 minutes or 1/6 hours
Distance = speed × time
d = 66 × 1/6
d = 11 km or 1100000 m
No. of revolutions = 1100000/1760/7
=> 7700000/1760
=> 770000/176
=> 4375
Answer : 4375 revolutions.
Similar questions