Question

The diameter of the wheel of a car is
84 cm and the speed of car is
72 km/h. The no. of revolutions made
by the wheel in 11 minutes is
(1) 5000
(2) 500
(3) 6000 (4) 600​

Answer 1

Answer:

5000

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Answer 2

Answer:

5000

Step-by-step explanation:

Diameter of car's wheel= 84cm or 0.84m

speed= 72km/h

= (72×1000)/3600

= 20m/s

total time= 11mimutes

= 11×60

= 660seconds

therefore,

distance travel by a car= speed×time

= 20×660

= 13200m

now, circumference of the wheel= 2πr or πd

= (22/7)0.84

= 2.64m

total number of revolution =total distance/circumference

= 13200/2.64

= 5000

thanks for your...