Question

train travel from hong kong to beijing it traveled at an average speed of 160 km/m in the first 4 hours. after that it traveled another average speed of 180 km/m. if the distance between hong kong to bejing is 1180 km, what was the total time for the whole journey?

Answer 1

7 hours

Step-by-step explanation:

Speed of train in first 4 hours = 160 km/h

Speed of train after 4 hours = 180 km/h

Distance = Speed × Time

`Distance=160* 4=640\ km`

Distance traveled in first 4 hours = 640 km

Distance remaining = 1180-640 = 540 km

Time = Distance / Speed

`Time=(540)/(180)=3\ hours`

Total time taken by the train is 4+3 = 7 hours

Answer 2

7 hours

Explanation: step 1. 160x4=640

step 2. 1180-640=540

step 3. 540÷180=3

step 4. 3+4=7