A hollow metal sphere has an internal radius of cm and an external radius of cm. Find its mass to the nearest gram given that the mass of a cubic centimeter of the metal is gm.
Step 1: Find the volume of the metal.
Subtract the volume obtained from the internal radius by the volume obtained from the external radius . Approximate to 2 decimal places.
Step 2: Find the mass of the metal.
Multiply the volume of the metal in cubic centimetres by the mass of each cubic centimetre. Approximate to the nearest gram.