Perimeter: circumference of 10 m diameter circle and half circumference of 15 m diameter circle plus 3 m at top:
10pi cm + (1/2)(15 pi cm) + 3 = (17.5 pi) m + 3 m
Area: area of 10 m diameter circle plus half area of 15 m diameter circle plus area of trapezoid:
pi*(5 cm)^2 + pi*(7.5 cm)^2 + (15 m + 3 m)
------------------- ----------------- * (14.5 m - 7.5 m)
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Review: area of a trapezoid is (a+b)*h
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