Question

A train travelling at 90km/hr crosses goods train at 50km/hr in opposite direction completely in 50 sec.How long it takes train to overtake same goods train,if travellling in same direction?

Answer 1

Answer:

175 sec

Step-by-step explanation:

A train travelling at 90km/hr crosses goods train at 50km/hr in opposite direction completely in 50 sec.How long it takes train to overtake same goods train,if travellling in same direction?

Total Speed when travelling in opposite direction = 90 + 50 = 140 km/hr

Time taken = 50 sec

Distance = Speed * time = 140 * (50/3600)  km

if Train overtakes another train

then Speed = 90 - 50 = 40 km/hr

Distance =  140 * (50/3600)  km

Time = 140 * (50/3600) /40  hr

= 700/4 sec

= 175 sec