Time, Speed and Distance Multiple Choice Questions | Problem on Trains & Boat and Streams
1. A boat goes 15 km upstream in 80 minutes. The speed of the stream is 5 km/h. The speed of the boat in still water is? A) 16.25 kmph B) 16 kmph C) 15 kmph D) 17 kmph ANSWER= (A) 16.25 kmph Solution:-15 km upstream in 80 minutes Æ 15/1.33 = 11.25 kmph. (upstream speed of the boat). Thus, still water speed of the boat = 11.25 + 5 = 16.25 kmph Check Answer 2. The speed of the boat in still water is 12 km/h and the speed of the stream is 2 km/h. A distance of 8 km, going upstream, is covered in? A)1 h B) 1 h 15 min C) 1 h 12 min D) None of these ANSWER= (D) None of these Solution:-8/(12 – 2) = 8/10 = 0.8 hours Check Answer 3. Two trains are running on parallel lines in the same direction at speeds of 40 kmph and 20 kmph respectively. The faster train crosses a man in the second train in 36 seconds. The length of the faster train is A) 200 m B) 225 m C) 185 m D) 210 m ANSWER= (A) 200 m