Radius of Wheel 21cm, How many rounds to cover 792 meters?

The radius of a wheel is 21 cm. How many rounds will it take to cover the distance of 792 meters?

  1. 400
  2. 600
  3. 200
  4. 300
Pushpendra Pal Dean Asked on 14th September 2015 in Maths.
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1 Answer(s)

Answer: (2) 600

Explanation: –
The radius of a wheel = 21 cm
Then, the circumference of the wheel = 2 x 22 x 21/7
= 2 x 22 x 3
= 132 cm
The distance covered by wheel in a round = 132 cm

Total distance covered by the wheel = 792 m
1 m = 100 cm
Therefore, 792 m = 792 x 100 = 79200 cm

Then, the number of rounds of the wheel to cover the distance 79200 cm = 79200/132
= 600

Hence, the answer is (2) 600.

Anurag Mishra Professor Answered on 15th September 2015.
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