How many seconds will a boy take to run one complete round of a square field…
2026
How many seconds will a boy take to run one complete round of a square field of side 20 metres, if he runs at a speed of 8 km/hr?
- A.
16
- B.
26
- C.
36
- D.
46
Attempted by 45 students.
Show answer & explanation
Correct answer: C
Step 1: Calculate the perimeter of the square field.
Perimeter = 4 × side length = 4 × 20 meters = 80 meters.
Step 2: Convert the speed from km/hr to m/s.
Speed = 8 × (5/18) = 40/18 = 20/9 meters per second.
Step 3: Calculate the time taken.
Time = Distance / Speed = 80 / (20/9) = 80 × (9/20) = 4 × 9 = 36 seconds.
Final Answer: Option 3