Question

A decorative block is made of a cube and a hemisphere of diameter 3.5 cm

Answer 1

Heya Mate Here Is Your Answer,

TSA of the block = CSA of Hemisphere + TSA of Cube - $\pi r^{2}$

= $2\pi r^{2} + 6a^{2} - \pi r^{2}$

= $2 X \frac{22}{7} X \frac{3.5}{2}^{2} + 6 X {3.5}^{2} - \frac{22}{7} X \frac{3.5}{2}^{2}$

=$11 X 0.5 X 3.5 + 6 X 3.5 X 3.5 - 11 X 0.5 X \frac{3.5}{2}$

= 19.25 + 73.5 + 9.625

= 102.375

HOPE IT HELPS.

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