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54 D 18 C 8 A 14 C (12 B 7 A 4) C 6 54 ÷ 18 + 8 – 14 + (12 × 7 – 4) + 6 = 3 + 8 – 14 + (84 – 4) + 6 = 3 + 8 – 14 + 80 + 6 = 83
A man can row 25/2 km an hour in still water and he finds that it takes him thrice as long as long to row down the river. The rate of stream is:
Speed of boat is 15 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 108 km downstream?
Find the total distance covered by boat in still water in 8 hours if the speed of boat in upstream and in downstream is 10 km/h and 15 km/h respectively?
A boat can cover 180 km in downstream in 18 hours and 125 km in upstream in 5 hours. Find the distance travelled by the boat in still water in 10 hours.
