In what time will a bus 200 m long cross in the road, if its speed be 72 km/hr?
Options:
(A) 15
(B) 20
(C) 14
(D) 10
(E) 12 OK. Let's think. Some random thoughts first:
Speed = 72 * 5/18 = 20 m/sec
Time taken = 200/20 = 10 sec. The answer: (D).