exam Maths Puzzle Numerical Ability

Find the weight of a snow ball 4 feet in diameter if the wet compact snow of which this ball was made weighs 30 pounds per cubic feet.Show solution and formulas.

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exam Other Question
-xy2
x3y2 my ? is if you first eliminate the y2 or you subtract the -x to x3? 1. The sum of two numbers is 50. Their difference is 22. What are the numbers?