Question

A toy is in the shape of a hemisphere with a diameter of 7 cm then find the surface area of the toy

Answer 1

Diameter of hemisphere = 7 cm
Therefore, Radius of hemisphere = 7÷2 cm = 3.5 cm
Therefore, Surface area of hemisphere =
$2\pi \times {(radius)}^{2} \\ = 2 \times \frac{22}{7} \times {( \frac{7}{2} )}^{2} \\ = \frac{44}{7} \times \frac{49}{4} \\ = 77 \: sq.m$
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Answer 2

Answer:

Step-by-step explanation:

CSA of hemisphere=2⚻r2=2×22/7×7/2×7/2

=76.96cm2