Multiple choice

Punit goes from his home to his relative's place at a speed of 45 km/h. While returning from the relative's place, due to traffic, it takes him an hour longer as he can only drive at the speed of 40 km/h. Find the distance (in km) of his relative's place from his home?

  1. 400

  2. 720

  3. 180

  4. 360

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let distance be d km. Time going = d/45 hours. Time returning = d/40 hours. We know returning takes 1 hour longer: d/40 = d/45 + 1. Solving: Multiply by 360: 9d = 8d + 360, so d = 360 km. This is a classic time-speed-distance problem where the difference in time gives us the equation.