SSC Government Jobs Exams Numerical Ability Area and Volume

If the radius of a sphere is increased by 2m, its surface-area is increased by 704 m^2. What is the radius of the original sphere?

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SSC Other Question

The number of coins, each of radius 0.75 cm and thickness 0.2 cm, to be melted to make a right circular cylinder of height 8 cm and radius 3 cm, is A right circular cylinder is circumscribing a hemisphere such that their cases are common. The ratio of their volumes is