Answer: 
Step-by-step explanation:
Given
The tower is 45 m high and Clinometer is set at 1.3 m above the ground
From the figure, we can write

Similarly, for 

Height of the tower is 
9=5+1+3
1=3/3
5 and 1/3=5+1/3
9-5 and 1/3=
9-5-1/3=
3+5+1-5-1/3=
3+5-5+1-1/3=
3+5-5+3/3-1/3=
3+0+2/3=
3+2/3=
3 and 2/3
I believe the length is 18 and the width is 3.