Question

Find the area of a Semicircle whose radius is 3.5 cm (take pi as 22/7
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Answer 1

`19.25cm^(2) \\`

Explanation:

Formula

`(\pi r^(2) )/(2)`

Solve

`(((22)/(7) )(3.5cm)^(2))/(2)= (((22)/(7) )(3.5cm)(3.5cm))/(2)=((((22)/(7) )(3.5cm))(3.5cm))/(2)=(((77)/(7)cm)(3.5cm) )/(2)`=

`((11cm)(3.5cm))/(2)=(38.5cm^(2))/(2)=19.25cm^(2)`

Answer 2

TSA=115.5cm²

Explanation:

T.S.A=3πr²

Given r=3.5cm

eq.

3×22/7×3.5×3.5

=3×22×0.5×3.5

=115.5cm²