exam Maths Puzzle Numerical Ability

Find the surface area of a right solid 8" high with the base of 10" x 10" x 4"

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Present value. The present value P that will amount to A dollars in n years with interest compounded annually at annual interest rater, is given by P = A(1 + r) ^-n The sum of the digits of a two-digit numeral is 8. If the digits are reversed, the new number is 18 greater than the original number. Find the original number.