Time, Speed & Distance

 Back to Questions

A passenger train takes two hours less for a journey of 300 km if its speed is increased by 5 km/hr from its normal speed. The normal speed is:


35 km/hr


50 km/hr


25 km/hr


30 km/hr

 Hide Ans

Option(C) is correct

Let the normal speed be '$s$' km/hr

Then new speed = $(s+5)$ km/hr


On solving this equation we get: 

$s$ = 25 km/hr

(2) Comment(s)


Someone solve: 2s^2+10^2+1500.

*^2 stands for raised to.


your equation is wrong. It should be Speed^2+5Speed-750=0

solution are 25 or -30 for that equation.

as speed can not be negative, the solution is 25.