Question

Wheel of a car take 100 revolution and covered 440m distance. Than find the diameter of wheel
SSC-cGL-19.6.2011)

Answer 1

distance covered in 100 revolutions =440m
distance covered in 1 revolution =440/100=4.4m

circumference of round=4.4m

$2\pi \times r = 4.4$
2×22/7×r4.4
r=44×7/44×10
r=0.7m

diameter=0.14m

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Answer 2

distance covered in 100 revolution = 440
distance covered in 1 revolution = 4.4m
circumference of circle = 4.4m
22/7×d = 4.4m