plz........ help me....
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Radius of the wheel = r = 60 / 2 = 30 cm
Circumference of the wheel = 2 Π r = (2 x 22 / 7 x 30) cm = 1320 / 7 cm
=> Distance covered by the wheel in 1 revolution = 1320 / 7 cm
=> Distance covered by the wheel in 140 revolutions = 1320 / 7 x 140 cm
= (1320 / 7 x 140 x 1 / 100000) km = 264 / 1000 km
This means that distance covered by the wheel in 1 minute = Distance covered in 140 revolutions
= 264 / 1000 km
Therefore, Distance covered in 1 hour = 264 / 1000 x 60 km = 15.84 km
Hence, the speed with which the man is cycling is 15.84 km / hr
Circumference of the wheel = 2 Π r = (2 x 22 / 7 x 30) cm = 1320 / 7 cm
=> Distance covered by the wheel in 1 revolution = 1320 / 7 cm
=> Distance covered by the wheel in 140 revolutions = 1320 / 7 x 140 cm
= (1320 / 7 x 140 x 1 / 100000) km = 264 / 1000 km
This means that distance covered by the wheel in 1 minute = Distance covered in 140 revolutions
= 264 / 1000 km
Therefore, Distance covered in 1 hour = 264 / 1000 x 60 km = 15.84 km
Hence, the speed with which the man is cycling is 15.84 km / hr
krusha1:
thanks
wlcm
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