Question

A man complete his trip of 136 km in 8 hours . Some parts of the trip was covered at 15 km/hr and the remaining in 18 km/hr. Find the part of the trip covered at 18km/hr.

Answer 1

x km by 18km/hr nd 136-x by 15km/hr
x/18+136-x/15=8
5x+816 -6x/90=8
816-x=720
x=96km by 18km/hr speed