the inner circumference of circular race track is264 m and the width of track is 7 m.calculate the cost of putting up a fence along the outer Circle of the track at the rate 15 .(useπ=22/7
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Answer:
Rs. 4620
Step-by-step explanation:
inner circumference = 2πr = 264
2 × 22/7 × r = 264
r = 264 × 7/22 × 1/2
r = 12 × 7 × 1/2
r = 6 × 7
r = 42 m
radius of outer circular track
= radius of inner circular track + width of track
= 42 + 7
= 49 m
fencing around the circular track we find its circumference
2πr
= 2 × 22/7 × 49
= 2 × 22 × 7
= 44 × 7
= 308 m
rate of fencing is Rs. 15/m
total cost of fencing
= 308 × 15
= 4620
total cost of fencing is Rs. 4620
hope you get your answer
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