Question

the inner circumference of a circular track is 176 them that there is 7 m wide calculate the:. a) area of track. b) cost of putting of a fence along the outer circle at the rate of rupees 12 per metre

Answer 1

the cost is rupees 2640

Answer 2

Answer:8

Step-by-step explanation:

inner circumference = 220

2 π r = 220

r *2* 22 = 220 * 7

r = 35 m [ inner radius ]

inner radius , r₁ = 35 m

outer radius , r₂ = 35 + 7 = 42 m

outer circumference = 2 π r ₂

= 2 * ( 22 / 7 ) * 42 = 264 m

Cost of fencing = Rs 2 * 264 = Rs 528

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