Question
Wed March 06, 2013 By: Avni Khurana
 

THE WHEELS OF A CAR ARE OF DIAMETER 140CM EACH.HOW MANY COMPLETE REVOLUTIONS DOES EACH WHEELMAKE IN 10 MINUTES WHEN THE SPEED OF THE CAR IS 66KM/HR

Expert Reply
Wed March 06, 2013
distance travelled by car=66*10/60
                                  =11 k.m.
distance travelled by car in one revolution=2*(22/7)*140=880c.m.
no. of revolutions=11000*100/880
                         =100*100/8
                         =25*50
                         =1250
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