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A boy covers a distance of 640 meters by a car in 32 seconds. Find the speed of the car.

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A boy covers a distance of 640 meters by a car in 32 seconds. Find the speed of the car.


1. 108 km/h
2. 30 km/h
3. 72 km/h
4. 60 km/h
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Correct Answer - Option 3 : 72 km/h

Given:

640 meters covered in 32 sec

Concept used:

Speed = Distance/Time

(km/h × 5/18) = m/sec

Calculation:

Speed in m/sec = 640/32

⇒ 20 m/sec

Speed in km/h = 20 × 18/5 

⇒ 72 km/h

∴ Speed of the car is 72 km/h

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