exam Maths Puzzle Numerical Ability

hi again i need help on this one!

V = pi r squared times height how do i solve this??

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exam Other Question

the miles per gallon ratings on a single model of a car may vary for many reasons, including the test driver and other factors. a new model line of popular car called the zinx, du There are some quarters and dimes in a piggy bank. There are 10 more quarters than the number of dimes, and their ratio is 3/2. How many quarters and dimes are there?