Question

the diameter of a wheel of car is 77 cm how many revolutions will it make to cover 121 km​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

50 revolutions

Step-by-step explanation:

Let the number of revolution be x

x × circumference of wheel = area covered

x × 2πr= 121 m

x × 2 × 22/7 × 77/2 = 12100 cm

x × 44×77/14 = 12100 cm

x × 3388 = 12100 cm

x = 12100/242 = 50

Hence, the wheel of car takes 50 revolution.