Q.

A bird is sitting on the top of a vertical pole 20m high and its elevation from a point O on the ground is 450. It flies off horizontally straight away from the point O. After one second, the elevation of bird from O is reduced to 300, then the speed (in m/s), of the bird is

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away
An Intiative by Sri Chaitanya

answer is 0014.64.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Let AB= height of vertical pole =20 From ΔOAB,tan⁡45∘=ABOA⇒OA=AB=20 Let C be the new position of bird  Let BC=x From ΔOCD,tan⁡30∘=20x+20⇒x=20(3−1)=14.64 m/s
Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon