two similar cylinders have surface areas of 40pi square feet and 90pi. What is the ratio of the height of the large cylinders to
the height of the small cylinder?
1 answer:
The ratio of heights = ratio of the square roots of the areas because area is 2 dimensional and height is one dimensional.
so required ratio is sqrt 40pi : = sqrt40:sqrt80 = sqrt1: sqrt2 = sqrt (1/2) = 0.7071 to 4 significant figures
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