a circle has a radius 28cm and a second concentric circle has a radius of 1m 26cm how much longer is the circumference of the second circle than that of first
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hey frnd.....
radius of 1st = 28cm
radius of 2nd = 126cm
now circumference of 1st = 2πr1 = 2×28π = 56π
and circumference of 2nd = 2πr2 = 2×126π = 252π
and the difference of there circumference = 252π - 56π
= 196π
= 196 ×22/7
= 28×22
= 616 cm
HOPE THIS HELP YOU ☺☺☺
radius of 1st = 28cm
radius of 2nd = 126cm
now circumference of 1st = 2πr1 = 2×28π = 56π
and circumference of 2nd = 2πr2 = 2×126π = 252π
and the difference of there circumference = 252π - 56π
= 196π
= 196 ×22/7
= 28×22
= 616 cm
HOPE THIS HELP YOU ☺☺☺
Anonymous:
hello
find the distance covered by the wheel of a bus in 2000 rotation if the diameter of the wheel is 98cm
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answer is 616
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