MANTU SAHU
7 years ago

In what time can sonali cover a distance of 400 m. if she runs at a speed of 20 km/hr ?

A. 4 minutes

B. 5 minutes

C. 2 minutes

D. 3 minutes

Solution (By Examveda Team)

Speed=20 km/hr = 5/18 × 20 = 50/9 m/s
Time = distance/speed
⇒400/(50/9)
⇒400×9/50
⇒8×9
⇒72 sec....
72 sec = 72/60= 6/5 = 1.2 min

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