Question

A passenger train that runs at the
speed of 78 km/h leaves the station
8 hours after the goods train left and
overtakes it is 5 hours. What is the
speed of goods train?

explain in detail

Answer 1

Answer: i think....

Step-by-step explanation:

distances travelled by 2 trains are same

so d is constant

therefore we take as

s 1*t 1=s 2*t 2

78 km/hr*8 hr=s 2*5 hr

624 km=5*s 2 hr

s 2=124.8 km/hr

s 2=speed of goods train

Answer 2

Answer:

30km/hr

Step-by-step explanation

s1 = 78km/hr (speed of passenger train)

s2 = ? (speed of goods train)

time taken by passenger train to overtake (same distance) goods train= 5hr

total time taken by goods train to travel same distance=8hr + 5hr = 13hr

since same distance,

s1 * t1 = s2 * t2

78km/hr * 5hr = s2 * 13hr

s2 = 30km/hr