Question

The outer edge of a circullor running track is 330 m long
He is voltes widened by 10 m around, find the cost wisdemə
it at us. 8 per square meter
​

Answer 1

Answer:

Step-by-step explanation:

Answer

Perimeter of track =2πr

2πr=440m

u=

44

440×7

​

=76m

Radius of road=70+5=75m

Area of road =πr

2

=

7

22

​

×75×75

=17678.57m

2

Area of track=πr

2

=

7

22

​

×70×70m

2

=220×70m

2

=15400m

2

Area of widening road= Area of road − Area of track

=17678.57−15400

=2278.57m

2

1m

2

costs =Rs. 8/−

2278.57 costs =Rs. 8×2278.57/-

=Rs. 18228.56.