Practicing Success
Points A and B are 200 km apart. A person starts from A at 10 a.m. at a speed of 10 km/h and goes towards B. Another person starts from B at 11 a.m. at a speed of 20 km/h and goes towards A. At what time will they meet? |
5:10 p.m. 4:40 p.m. 5:40 p.m. 5:20 p.m. |
5:20 p.m. |
Distance = Speed × Time Distance covered by A till 11:00 am = 10 × 1 = 10 km Remaining Distance = 200 - 10 = 190 km Relative Speed ( when they both move in opposite direction ) = 10 + 20 = 30 km/h Time when they meet = \(\frac{190}{30}\) = 6 hours + \(\frac{1}{3}\) hours So , The time when they meet is 11:00 am + 6 hours + \(\frac{1}{3}\) hours = 5:20 pm |