physics

could someone please break this down and show me how to do it?

A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms

The fishtank above measures 1 ft X 2 ft X 1 ft in English dimensional units. If water weights 62.4 lbs/ft3, what is the weight in lbs of the water filling the tank?
124.8lbs/ft3

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  1. 1. V = 30.5 * 61 * 30.5 = 56,745cm^3.

    2. m = 56,745cm^3 * 1g/cm^3 = 56,745g.

    3. m = 56,745g / 1000g/kg = 56.745kg.

    4. V = 1 * 2 * 1 = 2ft^3.

    2ft^3 * 62.4lb/ft^3 = 124.8 Lbs.

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