Quantitative Aptitude - Arithmetic Ability Questions

Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is

The total surface area of a hemisphere is 166.32 sq cm, find its radius?

Two circles are having radii 9 cm and 12 cm. The distance between their centres is 15 cm. What is the length (in cm) of their common chord?

A sum becomes Rs 8800 in 4 years at simple interest at the yearly interest rate of 25% per annum. What is the sum (in Rs)?

If cost price of 5 cars is equal to selling price of 4 cars. Find the percentage of profit or loss?

Divide 32 into two parts such that the sum of the square of the parts is 674. What is the value of the parts?

What is the area (in sq cm) of a rhombus if the lengths of the diagonals are 12 cm and 14 cm?

Δ DEF is right angled at E. If m ∠D = 30°. What is the length (in cm) of DE, if EF = 2√3 cm?