wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Three poles A,B and C are in a straight line, apart by 10 metres each. The height of pole A is 20 metres and the angle of depression from the top of pole A to the top of pole B is 60 and the angle of elevation from the top of pole B to the top of pole C is 30. The height (in metres) of pole C is

A
103(33)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
203(3+3)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
203(33)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
103(3+3)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 203(33)

Let height of pole B be h and height of pole C be H.
Then, tan60=20h10
h=20103

Again, tan30=Hh10
103=HhH=h+103H=20103+103H=20(31)3=203(33)

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Trigonometric Functions in a Right Angled Triangle
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon