Book Maths Puzzle Area and Volume

find the surface area of a cylinder whose height is 15 meters and whose base has a radius of 6 meters.

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Book Other Question

The area of a rectangular rug is 84ft sqaured and its perimeter is 38 ft. Find the length and width of the rug. The height, h, in metres, of an infield ball t seconds after being hit is given by the formula: h=20t-5t^2. How long is the ball in the air?