Question

2 m
19 Two paths cross each other at right angles in a
rectangular park as shown here. Find the area of the
path and the area of the park that is not covered by
250 m
the paths.
20 Find the area of the shaded regions in the given figures.
-500 m​

Answer 1

Explanation:

AC is the diameter of the circle.

In the right angled triangle ADC, we have

AC

2

=AD

2

+DC

2

(Pythagoras theorem)

AC

2

=5

2

+12

2

AC

2

=25+144

AC

2

=169

AC=13 cm

Radius of the circle =

2

AC

=

2

13

=6.5 cm

Area of the shaded part = Area of the circle − Area of the rectangle

= πr

2

−lb

= 3.14×6.5

2

−(5×12)

=132.665−60

=72.665 cm

hope it's help you