D. 7 1/2
A man rows downstream at 32 km and 14 km upstream at 13kmph.the speed of the stream is:
325-(12)² + 75= (?)²-68
A boat covers a certain distance downstream in 1 hour, while it comes back in 1 ½ hours. If the speed of the stream be 3 kmph. What is the speed of the boat in still water?
At what approximate time between 4 and 5 am will the hands o f a clock be at right angle?
A man’s speed with the current is 15 km/hr and the speed of the current is 2.5kmph, the man’s Speed against the current is