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/sTime = 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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