Question

A man completed a trip of 136 km in 8 hours.
Some parts 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 trip covered at 18km/hr be x = x/18. ------------------ (1)

So, Part of the trip covered at 15km/hr is (136 - x) = (136 - x)/15 -------------- (2)

On solving (1) and (2), we get

(136 - x)/15 + x/18 = 8(Given 8 hours)

(2448 - 18x + 15x)/ 15 * 18 = 8

2448 - 3x = 2160

3x = 288

x = 96km.