Question

If Total surface area of a solid hemispheres is 27 cm sq. Find its radius.

Answer 1

Answer:

1.6 cm.

Step-by-step explanation:

$\text{Let the radius of the hemisphere be r.}\\\\\text{Then, its total surface area = } 3 \pi r^2\\\\\text{But, given TSA = 27 cm} ^2\\\\\text{According to the question,}\\\\3 \pi r^2 = 27\\\\\implies 3 \times \dfrac{22}{7} \times r^2 = 27\\\\\\\implies r^2 = \dfrac{27 \times 7}{3 \times 22} = 2.86\\\\\implies r = \sqrt{2.86} = 1.6 \: cm \: approx.$

Hope it helps.

Answer 2

Answer:

hope it's help u

Step-by-step explanation:

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