Quantitative Aptitude - Arithmetic Ability Questions

Two pipes namely A,B can fill a sump in 25 minutes and half an hour respectively and a pipe C can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity off the tank is

Kaushik bought a toy for Rs. 160 and sold it for Rs. 180. The rate of profit was ___%.

Two circles with centres P and Q touch each other externally. A straight line drawn through the point of contact intersects the circle with centre P at A and the circle with centre Q at B. Then, which of the following is true?

What is the slope of the line parallel to the line passing through the points (5, -1) and (4, -4)?

What is the slope of the line perpendicular to the line passing through the points (­-4,5) and (3,­-2)?

Find the total surface area (in cm2) of a cube of side 3.5 cm.

If the edge of a cube is increased by 2 cm, the volume will increase by 488 cub.cm. What then will be the length of each edge of the cube?

A water tank has two holes. The 1st hole alone makes the tank empty in 3 min and 2nd hole alone makes the tank empty in 5 min. If water leaks out at a constant rate, how long in minutes does it take if both the holes together empty the tank?