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

Answer:

Step-by-step explanation:

# total trip time = 8 hrs.

total trip distance = 136 km.

Let x distnce covered @ 15 km/h.

y distance covered @ 18 km/h.

So :- x+y = 136 (1).

15

x

​

+  

18

y

​

=8⇒  

90

64+54

​

=8⇒6x+5y=720 __ (2)

By (1) & (2).

6x+6y=816

6x+5y=720  

___________  

y=96.

& x=136−96=40

x=40

So :- 40 km by 15km/h & 96 km by 18 km/h