A car starts at 3 p.m.at a speed of 50 km/h. Another car follows it at 4 p.m.at a speed of 75 km/h. At what time will the two cars will meet?

6 p.m.

According to question ,

Distance covered by car1 till 4 pm = 50 km

Car 2 will start at 4pm.

Distance covered by car1 till 5 pm = 100 km

Distance covered by car2 till 5 pm = 75 km

Distance covered by car1 till 6 pm = 150 km

Distance covered by car2 till 6 pm = 150 km .

Both cars covers 150 km from the starting point at 6 pm .

Therefore both the cars will meet at 6 pm