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Find the total surface area of a solid hemisphere of radius 0.07 m. (Use π = 227\frac {22}7722​​)
Question

Find the total surface area of a solid hemisphere of radius 0.07 m. (Use π = 227\frac {22}7​)

A.

442 cm²

B.

472 cm²

C.

452 cm²

D.

462 cm²

Correct option is D

Given:
Radius of the hemisphere = 0.07 m.
Formula Used:
Total Surface Area of a Solid Hemisphere = 3πr23π r^2​​
Solution:
Radius, r = 0.07 m = 7 cm.
=> Total Surface Area = 3×227×(7×7)3 \times \dfrac{22}{7} \times (7 \times 7)​ = 462 sq. cm.

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