Time Speed Distance
Practice Questions - Time Speed and Distance
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Q16) Two trains moving in opposite directions at 65 Km/hr and 85 Km/hr. Their lengths are 435 m and 315 m
respectively. Time taken by the slower train to cross the faster train is: 1) 6 sec 2) 15 sec 3) 12 sec 4) 18 sec  Hence, option 4. Q17) A jogger is jogging at 5 Km/hr along the side of a railway track 215 meters ahead of a train of length 145 meters running at 59 Km/hr in the same direction. In how many seconds will the train cross the jogger? 1) 24 sec 2) 5 sec 3) 45 sec 4) 18 sec
Relative speed of the train w.r.t the jogger = (59 - 5)Km/hr = 15 m/sec  Hence, option 1. Read More: Problems on TrainsQ18) A train of length L1 meters travelling at a speed S1 m/sec will cross another train of length L2 meters travelling at a speed S2 m/sec in the same direction in how many seconds.  Hence, option 4. Download: Practice Questions on the Concept of TrainsQ19) A boat goes downstream at the rate of 1 Km in 10 minutes and goes upstream at the rate of 1 Km in 15 minutes. What is the speed of boat in still water?1) 1 Km/hr 2) 5 Km/hr 3) 6 Km/hr 4) 4 Km/hr
Let B be the speed of the boat in still water ans S be the speed of the stream. Downstream speed of the boat = B + S = 6 Km/hr Upstream speed of the boat = B - S = 4 Km/hr On solving, B = 5 Km/hr Hence, option 2. Read More: Boats and Streams (Concept with Example)Q20) A motorboat whose speed is 15 Km/hr in still water goes 40 Km downstream and comes back in 6 hours. The speed of the stream is1) 20 Km/hr 2) 10 Km/hr 3) 8 Km/hr 4) 5 Km/hr
Let S be the speed of the stream. A.T.Q.  On solving, S = 5 Km/hr Hence, option 4. |