A train travels at a certain average speed for a distance of 63 km and then Travels at a distance of 72 km at an average speed of 6 km per hour more than its original speed if it takes 3 hours to complete total journey what is the original speed ?
My solution :
63/x + 72/(x+6) = 3
After solving I got the answer => x=42
I wrote the answer as the train's original average speed is 42km/hr .
Is it correct ??????
An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. What speed it must attain to cover the same distance in 123 hours?