Answers

2016-02-10T07:16:24+05:30
The circumference of a circle = 2πr (r= radius)
                                                = 2×22/7×42/2
                                                =132 c.m
distance covered by wheel in 1 revolution = 132 c.m or  1.32 meters
      1.98km = 1980 meters so,
   no of revolutions made by a wheel is = (1980/1.32)meters
                                                                = 1500 revolutions                                          
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