A car completes a certain journey in $8$ hours . It covers half the distance at $40 k m / h r$ and the rest at $60 k m / h r$ . The length of the journey is

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Solution

Let the length of the journey be "d".
According to the given problem,
$t i m e = \frac{d i s t a n c e}{s p e e d}$
$8 h = \frac{d / 2}{40} + \frac{d / 2}{80} = \frac{d}{80} + \frac{d}{160} \Rightarrow d = 426.67 m$

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A car completes a certain journey in 8 hours . It covers half the distance at 40km/hr and the rest at 60km/hr. The length of the journey is

Let the length of the journey be "d".According to the given problem,time=distancespeed8h=d/240+d/280=d80+d160⇒d=426.67m

A car completes a certain journey in $8$ hours . It covers half the distance at $40 k m / h r$ and the rest at $60 k m / h r$ . The length of the journey is

Let the length of the journey be "d".
According to the given problem,
$t i m e = \frac{d i s t a n c e}{s p e e d}$
$8 h = \frac{d / 2}{40} + \frac{d / 2}{80} = \frac{d}{80} + \frac{d}{160} \Rightarrow d = 426.67 m$