A man can row a boat at a speed of 20 km/hr in still water. If the speed of the stream is 5 km/hr, in what time he can row a distance of 75 km downstream?
| Question | A man can row a boat at a speed of 20 km/hr in still water. If the speed of the stream is 5 km/hr, in what time he can row a distance of 75 km downstream? | |
| Type | multiple_choice | |
| Option | 1.5 hours | incorrect |
| Option | 2 hours | incorrect |
| Option | 2.5 hours | incorrect |
| Option | 3 hours | correct |
Speed of stream = 5 km/hr
∴ Speed downstream = 20 + 5= 25 km/hr
Required Time = Distance / speed 75/25 = 3 hours