Question

a gardener has to lay a grass in a circular garden ,leaving a space of 5m all around it , if the area of the ground with grass is 59400/21m^2 find the area without grass use pie =22/7

Answer 1

Step-by-step explanation:

ANSWER

Let radius of ground be R m.

Now, πr

2

=

21

59400

m

2

⇒r

2

=

21×22

59400×7

=900

⇒r=

900

=30m

∴ area of ground without grass =πR

2

−

21

59400

=π(30+5)

2

−

21

59400

=

7

22

×35×35−

21

59400

=3850−

21

59400

=

21

80850−59400

=

21

21450

=1021

7

3

m

2