Question

The wheels of a car are of radius 40 cm each. If the car is travelling at a speed of 66

km per hour, find the number of revolutions made by each wheel in 20 minutes.​

Answer 1

Answer:

Radius =40cm

then distance travelled by the car in one revolution =2πr

=2π40  =80πcm

no. of revolutions in one hour =100*1000*66cm/80π(change 66km/hr to 66cm/hr)

(calculate to get the answer)

then divide the answer by three to get the answer for 20 minutes

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Answer 2

Answer:

Step-by-step explanation:

radius =40cm

then distance travelled by the car in one revolution =2πr

=2π40  =80πcm

no. of revolutions in one hour =100*1000*66cm/80π(change 66km/hr to 66cm/hr)

(calculate to get the answer)

then divide the answer by three to get the answer for 20 miniute