Gopal covers 100 km. He travels at a speed of 60 kmph for the first 40 km and the rest of the distance at 40 kmph. What is his average speed in kmph?

Time for the first 40 km at 60 km/h = 40/60 = 2/3 h. Time for the remaining 60 km at 40 km/h = 60/40 = 1.5 h. Total time = 2/3 + 3/2 = 13/6 h. Average speed = total distance / total time = 100 ÷ 13/6 ≈ 46.15 km/h, closest to 46.20 km/h.