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

A train moves with a speed of 108 kmph. Its speed in meters per sec

A train crosses a platform 100 m long in 60 sec at a speed of 45 km/hr. the time taken by the train by the train to cross an electric pole is:

A train running at 7/11 of its own speed reached a place in 22 hours. How much time could be saved if the train would have run at its own speed?

In what time will a train 100 meters long cross an electric pole, if its speed be 144 km/hr?

A 120m-long train crosses a 30-long bridge in 7.5 seconds. What is the speed of that train in km/h?

A salesman travels a distance of 50 km in 2 hours and 30 minutes. How much faster, in kilometers per hour, on an average, must he travel to make such a trip in 5/6 hour less time?