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The speed of a boat in still water is 15 km/h and the rate of, stream is 5 km/h. The distance travelled downstream in 24, minutes is, , (a) 4km (b) 8km () 6km = (d)_-‘16km, ‘Aman rows upstream 24 km and downstream 36 km taking 6, hours each. Find the speed of current., , (a) 05km/h (6) [km/h (c) LSkm/h (d) 2kmh, A motor boat whose speed is 15 km/h in still water goes 30, km downstream and comes back in four and a half hours., The speed of the stream is :, , (a) 46km/h (b) 6km/h =) -7kmh =a) Skmh, , ‘A boat goes 24 km upstream and 28 km downstream in 6, hours. It goes 30km upstream and 21 km downstream in 6, hours and 30 minutes. The speed of the boat in still water is :, (a) 10kmh (b) 4km/h— (ce) 14km/h (Ad) Oh, Ifa man’s rate with the current is 12 km/hr. and the rate of the, current is 1.5 km/hr, then man’s rate against the current is —, (a) 9knvbr — (b) 6.75knV/hr (c) 5.25 kn/hr (d) 7.5 knvhr, The speed of a motor boat to that of the current of water is, 36 : 5. The boat goes along with the current in 5 hours 10, minutes. It will come back in, , (a) Shours (bo) Ghours 15 min, , (c) 6hours 30min (d) 6hours 50min, , A steamer goes downstream from one part to another in 4, hours. It covers the same distance upstream in 5 hours. If, the speed of stream is 2 km/hr, the distance between the two, ports is, , (a) 45km —(b) 64km_—s (©) OSkm_—(d)_-« 80m, A boat takes half the time in moving a certain distance, downstream than upstream. The ratio between rate in still, water and rate of current is, , @) 1:4 (b) 1:2 (© 3:1 (@) 3:2, , A person can row a boat d km upstream and the same distance, downstream in 5 hours 15 mins. Also he can row the boat 2d, km upstream in 7 hours. How long will it take to row the same, distance 2d km downstream., , 2, (@) 75 hours ) 73 hours, , (©) 8hours @ hours, , The speed of a boat in still water is 8 km/hr. It can travel, 20 km downstream at the same time as it can travel 12 km, upstream, the rate of stream (in kmph) is, , (a) 05 (b) 2 (c) 25 (d) 2.75, , Aman swimming in a stream which flows 1.5 km/hr, finds, that in a given time he can swim twice as fast with the stream, as he can against it. At what rate does he swim ?, , (a) 45knv/hr (b) 5.25knv/hr, , (c) km/hr (d) None of these, , Aman swims downstream 40 km in 4 hours and upstream 24, km in 3 hours. His speed in still water is, , (a) 8kmbr — (b) &Skm/br (c) 9knV/hr (d) 9.5 knvbr, Aman can row three-quarters of a kilometer against the water, , stream in ain minutes and along the stream in qi minutes, , respectively. The speed in (km/hr) of the man in still water is, (a) 35 (b) 25 () 5 (d) 65, Aman rows 10 km upstream and back again to the starting, point in 55 min. Ifthe speed of stream is 2 km/hr, then the, speed of rowing in still water is, , (a) 22km/br (b) 19kmV/hr (c) 21 ke/hr (d)25knVhr, A boat covers 24 km upstream and 36 km downstream in 6, hours, while it covers 36 km upstream and 24 km downstream, , in 6; hour, The velocity of the current ix, , (a) 24kmv/hr (b) 2km/hr (c) 3kmv/hr (d) 0.75km/hr, A man takes twice as long to row a distance against the, stream as to row the same distance in favour of the stream., The ratio of the speed of the boat (in still water) and the, stream is, , (a) 3:1 (b) 4:3 () 2:1 (@) 3:2, , A boat takes 19 hours for travelling downstream from point, A to point B and coming back to point C, mid way between, A and B. If the velocity of the stream is 4 km/hr and the, speed of the boat in still water is 14 km/hr. then the distance, between A & Bis, , (a) 200km = (b) 1600km_ (c)_:180km (4) 190km, Aman can rowa boat 120 km with stream in 5 hours. If speed, of the boat is double the speed of the stream, then the speed, of stream is, , (a) 6kmh_ (6) 8kmh_—s ()-:«*9km/h_—s (d):—s2kmh, Aman rows a distance downstream in 45 min and the same, distance upstream in 75 min. What is the ratio of speed of, the stream to the boat in still water ?, , (@) 1:2 (b) 1:3 () 1:4 @ 2:3, Aman can row 5 kmph in the still water. Ifthe river is running, at 2 kmph, it takes him 5 hours to row up toa place and come, down. How far is the place?, , (a) 6km (b) 8km ©, , 10km = (@)_14km