Question

एक कार (Car) 40 किलोमीटर प्रति घण्टा की गति (Speed) से जा रही है । उसके 5 किलोमीटर एक दूसरी कार (Car) 50 किलोमीटर की गति (Speed) से पीछा कर रहा है । बताओ, पीछे वाली (Car), आगे वाले कार (Car) को कितनी देर में पकड़ लेगी?​

Answer 1

Answer:

one hour 30 minutes mein

Answer 2

Given,

Speed of first car $\[ = 40km/h\]$

Speed of second car $\[ = 50km/h\]$

Solution,

Consider second car catches the first car in $\[t\]$ hour.

Know that first car will cover $\[5km\]$ more than second car.

$\[\begin{array}{l}50t = 40t + 5\\ \Rightarrow 50t = 40t + 5\\ \Rightarrow 10t = 5\end{array}\]$

$\[ \Rightarrow t = \frac{1}{2}hour\]$

Hence second car will catch first car in $\[\frac{1}{2}hour\]$.