If =-2x² + 12x, B=11 - 8x + 3x², C = 17 - 4x² and D = x² - x - 3 then what is the sum of the co-efficients of x² and x in ?

Find the value of x in the proportion 69 : 23 :: 63 : x.

Two pipes, P and Q, together can fill a tank in 5 hours. If pipe P alone can fill the tank in 10 hours, then how much time (in hours) will pipe Q alone take to fill the tank?

25 persons, each working 10 hours a day, can complete 2 units of work in 4 days. How many days will it take for 10 persons working 9 hours a day to complete 18 units of work?

The surface area of a cube is 480 $$cm^2$$​ Find its volume.

A bus is moving at a speed of 82 km/hr. If its speed is reduced by 28%, then what will be the new speed of the bus (in km/hr)?

Find the value of x in the proportion 69 : 23 :: 63 : x.

Two pipes, P and Q, together can fill a tank in 5 hours. If pipe P alone can fill the tank in 10 hours, then how much time (in hours) will pipe Q alone take to fill the tank?

25 persons, each working 10 hours a day, can complete 2 units of work in 4 days. How many days will it take for 10 persons working 9 hours a day to complete 18 units of work?

The surface area of a cube is 480 $$cm^2$$​ Find its volume.

A bus is moving at a speed of 82 km/hr. If its speed is reduced by 28%, then what will be the new speed of the bus (in km/hr)?