A train sets off at 2:00 pm at the speed of 70 kmph. Another train starts at 3:30 pm in the same direction at the rate of 85 kmph. At what time the trains will meet?
Answer with explanationAnswer: Option C
D = 70 * 1 1/2 = 105 km
RS = 85 – 70 = 15
T = 105/15 = 7 h
3:30 + 7 h = 10:30 pm
Two trains A and B start running together from the same point in the same direction at 60kmph and 72kmph respectively. If the length of each train is 240m. How long will it take for the train B to cross train A?
Answer with explanationAnswer: Option B
Relative speed =(72 -60)kmph