A cargo flew to Melbourne and back. It took one hour longer to go there than it did to come back. The average speed on the trip there was 210km/h. The average speed on the way back was 240km/h. How many hours did the trip there take?

Question

anonymous · Answer

total time for to & fro journey is 7hrs........rgt?

anonymous · Answer

Hey genuine is it crt?

ar43r · Answer

let x be time for the trip back
240x=210(x+1)
240x=210x+210
30x=210
x=7

the way there took 1 h more. 
so 8h