Pavel and Rajib started from the opposite direction of a 10km racing track. Their speed is 15kmph and 10kmph respectively. After which time they will meet if they start simultaneously?

Question: Pavel and Rajib started from the opposite direction of a 10km racing track. Their speed is 15kmph and 10kmph respectively. After which time they will meet if they start simultaneously?

Solution:

let, they will meet after t hour at point X.
in t hour,
A will cross = (15 × t) = 15t km
B will cross = (10 × t) = 10t km

ATQ,
15t + 10t = 10
25t = 10
t = 0.4 hours
= 24 minutes