Find the surface area of a hemisphere with a diameter of 26 cm. Round your answer to the nearest tenth.

1 answer:

4 0

The surface area of a sphere is $4 \pi r^{2}$ .

Hence, the surface area of a hemisphere is half that, $2 \pi r^{2}$ .

If the base is also included then the surface area will be $3 \pi r^{2}$ .

Given,

Diameter = 26 cm

Therefore, Radius = $\frac{26}{2}$ = 13 cm

Thus,

Area = $3 * \pi * 13^{2} = 3 * \pi * 169 = 507 \pi =$ = 1592.8 $cm^{2}$ [approx.]

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