The diameter of the wheel of a car is 84 cm and the speed of car is 72km/h.The no. of revolutions made by the wheel in 11 minutes?
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Answer:
circumference of O= 2πr
= 2(22/7)42
= (44/7)42
=44(6)
=264cm
speed = 72km/h
time= 11/60h
Step-by-step explanation:
distance covered in one minute = 72/60 = 1.2km
distance covered in 11min = 1.2(11) = 13.2km
revolutions in 11min = 13.2 x 10^3/264
= 1000/20
50 revolutions
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