RRB Group D 10-Oct-2018 Shift 2 Solved Paper

Question : 87 of 100

Marks: +1, -0

A semicircle is inscribed inside a rectangle in such a way that the diameter of the semicircle coincides with the length of the rectangle. If the area of the semicircle is

50 \π,

then what is the area of the rectangle?

Validate

Solution:

Area of semicircle

={\π r^{2}}/{2}=50 \π

⇒{r}^{2}=100

{r}=10

Thus, length of rectangle

=20

breadth of rectangle

=10

Area

=20 \× 10=200

sq. units

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