Question

The inner circumference of a circular race track is 264 m and the width of the track is 7m. Calculate the
cost of putting up a fence along the outer circle of the track at the rate of 15 per metre.​

Answer 1

Answer:

Inner circumference of circular track = 264 m

(i) Inner radius r = \frac{C}{2\pi}

2π

C

=\frac{264\times7}{2\times22}=\frac{1848}{44}=42\ cm=

2×22

264×7

=

44

1848

=42 cm

(ii) Width of track = 7m

Outer radius R = 42 + 7 = 49 m

(iii) Outer circumference = 2\pi r=2\times\frac{22}{7}\times49=308\ m2πr=2×

7

22

×49=308 m

(iv) Rate of fencing = 50 Rs per meter

Total cost of fencing outer circumference = 50 x 308 = Rs. 15400

HOPE IT HELPED YOU ♥️♥️

Answer 2

Answer:

The inner circumference of a circular race track is 264 m and the width of the track is 7m. Calculate the

cost of putting up a fence along the outer circle of the track at the rate of 15 per metre.