Question

Rajesh completed a trip of 136 km in 8 hours. Some part of the trip was covered at
15 km/hr and the remaining at 18 km/hr. Find the part of the trip covered at 18 km/hr.​

Answer 1

Step-by-step explanation:

Let the number of hours Rajesh drove at 15 km/hr be x hours. Hence the remaining (8-x) hours Rajesh drove at 18 km/hr. Total distance =136 km=15(x)+18(8-x) =>136= 15x

+144-18x =>3x=144-136=>x=8/3 hours. Hence the distance travelled at 15 km/hr is 8/3(15) =>40km. Distance travelled at 18 km/hr is 96km. Hope it helps you.