Recent questions tagged boat-stream

1
A man rowed $3$ miles upstream in $90$ minutes. If the river flowed with a current of $2$ miles per hour, how long did the man’s return trip take? $20$ minutes $30$ minutes $45$ minutes $60$ minutes
2
The velocity of a boat ralative to water is $3i+4j$ and that of water relative to earth is $i-3j$, the velocity of the boat relative to the earth is: $3i+4j$ $4i+j$ $4j+i$ $i+4j$
A boat takes $90$ minutes less to travel $36$ miles downstream than to travel the same distance upstream. If the speed of the boat in still water is $10$ mph, the speed of the stream is: $2$ mph $2.5$ mph $3$ mph $4$ mph
A boat travels upstream from $P$ to $Q$ and downstream from $Q$ to $P$ in $4$ hours. If the speed of the boat in still water is $12$ km/hr and the speed of the current is $4$ km/hr, then what is the distance from $P$ to $Q$? $31\dfrac{1}{3}$ km $41\dfrac{1}{3}$ km $21\dfrac{1}{3}$ km $11\dfrac{1}{3}$km
A boatman goes $2$ km against the current of the stream in $1$ hour and goes $1$ km along the current in $10$ minutes. How long will it take to go $5$ km in stationary water? $40$ minutes $1$ hour $1$ hr $15$ min $1$ hr $30$ min