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
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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?
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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?