The circumference of a circle exceeds its diameter by 75 cm. Find the radius of the circle.(for class 7)
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Answer:
let the diameter be 2×radius =2r
circumference= 75 + 2r
2πr =75 + 2r
2×22/7 ×r =75+2r
44/7r = 75 +2r
44/7r-2r =75
(44-14)r/7 =75
30r/7=75
r=(75×7)/30
r=17.5cm
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