If kamal travels 20 km/hr, he reaches the office 10 minutes late and if he travels at 25 km/hr, he reaches the office 5 minutes earlier. The office is at a distance of.

Question: If kamal travels 20 km/hr, he reaches the office 10 minutes late and if he travels at 25 km/hr, he reaches the office 5 minutes earlier. The office is at a distance of.

Solution:
অফিসের দূরত্ব x হলে,
কামাল x দূরত্ব যায় (x/20) এবং (x/25) সময়ে।
The difference between the time = {5 - (-10)} ⇒ 15 minutes

ATQ,
Or, (x/20) - (x/25) = 15/60
Or, (5x - 4x)/100 = 1/4
Or, x/100 = 1/4
Or, 4x = 100
Or, x = 25