The respective ratio between the speed of a car , a train , and a bus is 5 : 9 : 4 . The average speed of the car, bus and train is 72 km / hr together . what is the average speed of the car and the train together?

Three angles of a triangle are in proportion 5: 6: 7. Then what is the difference in degrees between he bigges...

A water tank has two taps ( Tap-1 and Tap-2) : Tap-1 can fill a tank in 8 hours and Tap-2 can empty the tank i...

The average of the three numbers x , y and z is 45 , x is greater than the average of y and z by 9. The averag...

A can finish a work in 5 days and B takes 4 days to do the same work . If the work is increased by 8 times, ho...

A short distance athlete has taken 60 sec to cover 100m. If he makes 30 steps in 9, sec how many steps has he...

A manufacturer sells three products i.e A, B C. Product A costs 200 and sells for 250, product 150 and sells f...