ANSWER

EXPLANATION
We want to simplify

We multiply the first fraction by the reciprocal of the second fraction to obtain,

We cancel the common factors to get,

This gives us,
Answer:
1. 98.7 km
2. 303.5 degree
Step-by-step explanation:
Using the alternate angle, the angle at B will be 50 + 10 = 60 degree.
To calculate the length AC of the returning journey, use cosine formula to calculate it.
To find the bearing of the returning journey, use sine rule to calculate it.
Please find the attached file for the solution
A)
Triangle ABX
Height = 8m
Base = 26-11 m
Find length by AB^2 = 15^2 + 8^2
b) Find AC by using AB as Height and BC as base
AC^2 = AB ^2 + BC ^2