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ICSE Class 9 Answered

The radius of wheel of a car is 28 cm . Find the number of rotation made by the wheel in order to cover a distance of 4.4 km?

 

Asked by anshu8958660720 | 18 Oct, 2020, 11:57: AM
Expert Answer
radius =28 cm
C i r c u m f e r e n c e equals 2 pi R
equals 2 cross times 22 over 7 cross times 28
equals 44 cross times 4
equals 176
Total distance =4.4km=4400m
Distance covered in 1 rotation =176cm 
Distance covered in 1 rotation =1.76m
Number of rotation=Total distance /Distance cobvered in one rotation
=4400/1.76
Total number of rotation=2500
Answered by Renu Varma | 29 Dec, 2020, 03:25: PM
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