In a 100 metres race, Kamal defeats Bimal by 5 seconds. If the speed of Kamal is 18 kmph, then the speed of Bimal is :

Solution (By Examveda Team)

Time taken by Kamal :
$$ = \frac{{100}}{{18 \times \frac{5}{{18}}}} = 20\sec $$
Time taken by Bimal :
$$\eqalign{ & = 20 + 5 \cr & = 25\sec \cr} $$
Speed of Bimal :
$$\eqalign{ & = \frac{{100}}{{25}} \times \frac{{18}}{5} \cr & = 14.4{\text{ kmph}} \cr} $$