Question

50 m long train are crossing each other in opposite direction with velocity of 10 metre per second and 15 m per second respectively then the time taken by the train to cross each other

Answer 1

simple , first the distance of separation is {D}= 50 + 50 = 100

relative velocity {V }= 10 + 15 = 25 { as both trains are coming towards each other }

time taken = D/V = 100/25 =4 seconds