Question

The total surface area of a hemispherical solid having radius 7 cm is
(a) 462 cm²
(b) 294 cm²
(c) 588 cm²
(d) 154 cm²

Answer 1

hi mate here is your answer

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radius = 7

take π = 22/7

TSA OF hemisphere= 3πr²

==> 3×22/7×7²

===>33× 22× 7

====> 462cm²

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hope it is helpful

✌️Ur mate sunny ✌️

Answer 2

Answer:

Option a) is the correct answer to the given problem.

The total surface area of a hemispherical solid will be$462cm^2$.

Step-by-step explanation:

Given: The radius of the hemispherical solid is radius 7 cm.

We have to find the total surface area of a hemispherical solid.

• As we know, the formula is used to calculate the area of the hemisphere is:

            $A=3 \pi r^{2}$

We are solving in the following way:

We have,

The radius of the hemispherical solid is radius 7 cm.

The total surface area of a hemispherical solid will be:

$A=3 \pi r^{2}\\A=3 \pi 7^{2}\\\\A=3\times\frac{22}{7} \times7\times7\\\\A=3\times22\times7\\A=462$

Hence, the total surface area of a hemispherical solid will be$462cm^2$.