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The speeds of three motor bikes are in the ratio 6 : 5 : 4. The ratio between the time taken by them to travel the same distance is :

 The speeds of three motor bikes are in the ratio 6 : 5 : 4.  The ratio between the time taken by them to
    travel the same distance is :

a) 10 : 12 : 15     b) 12 : 10 : 8    c) 15 : 12: 10   d) 10 : 15 : 12















 Expl :  Ratio of time taken : 1/6 :1/5 : 1/4  = 10 : 12 : 15
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