thakidmiguel2 thakidmiguel2

10-05-2017
Mathematics

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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?

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Аноним Аноним

10-05-2017

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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