1.

A person completes ajourney in 15 hours, the first half at 12 kmh"1 and the second half at 18 kmh"1. What is the total distance ?

Answer»

216 km



Let the total distance be x - x/2 km
travelled at a SPEED 12 kmph-1 and another x/2 km
at a speed 18 kmh-1
Therefore, TIME TAKEN = x/2 x 12 + x/2 x 18 = 15
x/24 + x/36 = 15
Therefore, 5x/72 = 15
Therefore, x = 216 km.



Discussion

No Comment Found