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Asked by Manisha Last Modified
Answer 
Abhay
Diameter of the wheel of the car = 80 cm
Radius (r) of the wheel of the car = 40 cm
Circumference of wheel = 2πr
= 2π (40) = 80π cm
Speed of car = 66 km/hour
Distance travelled by the car in 10 minutes
= 110000 × 10 = 110000 cm
Let the number of revolutions of the wheel of the car be n.
n × Distance travelled in 1 revolution (i.e., circumference)
= Distance travelled in 10 minutes
Therefore, each wheel of the car will make 4375 revolutions.
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Dolly Sogani
Distance covered in one revolution of the wheel is 2πR = 2 x 3.14 x 0.40 m ( 1 cm = .01 m)
= 2.512 m
Total distance covered in 10min = speed x time
= 66x1000 m x 10 min / 60 min
( 1 hr = 60 min)
= 11000 m
Hence no of revolutions per wheel the car will make to cover 11000m will be = 11000/ 2.512 = 4378 rev.
read less
Dolly Sogani
Distance covered in one revolution of the wheel is 2πR = 2 x 3.14 x 0.40 m ( 1 cm = .01 m)
= 2.512 m
Total distance covered in 10min = speed x time
= 66x1000 m x 10 min / 60 min
( 1 hr = 60 min)
= 11000 m
Hence no of revolutions per wheel the car will make to cover 11000m will be = 11000/ 2.512 = 4378 rev.
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