RRB Group D 22-Sep-2018 Shift 1 Solved Paper

Question : 43 of 100

Marks: +1, -0

The area of the circum circle of a right angle triangle whose sides are given as

2 \ { cm}, 2 \√{3} \ { cm}

and

4 \ { cm},

is given by

Solution:

Sides of triangle are

: 2 \ { cm}, 2 \√{3} \ { cm}, 4 \ { cm}

Largest side is hypotaneous.
So,

A C=4 \ { cm}

Let radius of circle is

r

2 r=4 \ { cm}, r=2 \ { cm}

Area of circle

=\π(r)^{2}=\π(2)^{2}=4 \π

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