How many seconds will a boy take to run one complete round around a square field of side 55 metres, if he runs at a speed of 18 km/h?

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  1. 44
  2. 37
  3. 47
  4. 35

Answer (Detailed Solution Below)

Option 1 : 44
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Detailed Solution

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Given:

Side of the square field = 55 meters.

Speed of the boy = 18 km/h = 18 × 1000 / 3600 m/s = 5 m/s.

Formula Used:

Time taken = Total distance / Speed

Calculation:

Perimeter of the square field = 4 × Side

Perimeter = 4 × 55

Perimeter = 220 meters

Time taken = Total distance / Speed

⇒ Time taken = 220 / 5

⇒ Time taken = 44 seconds

The boy will take 44 seconds to run one complete round around the square field.

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