Question

question 8th 9th and 10th

Answer 1

8)distance between the building and point p is x
tan30=10/x
1/root 3=10/x
x=10 root 3
height of the flag post is y
tan45=10+y/10root 3
1=10+y/10 root 3
10+y=10root 3
y=10 root 3-10
y=10(root3-1)m