THE ANGLE OFELEVATION OF AN AEROPLANE FROM A POINT ON THE GROUND IS 60.AFTER FLYING 15SECONDS THE ANGLE OF ELEVATION CHANGES TO 30.IF THE AEROPLANE IS FLYING AT A CONSTANT HEIGHT OF 1500√3 ,FIND THE SPEED OF THE AEROPLANE

Answers (1)
S safeer

From triangle ACD

\\\\tan30=\frac{CD}{AD}\\\frac{1}{\sqrt{3}}=\frac{1500\sqrt{3}}{AD}\\AD=4500m

From triangle ABE

\\\\tan60=\frac{EB}{AE}\\\sqrt{3}=\frac{1500\sqrt{3}}{AE}\\AE=1500m

The distance travelled in 15sec BC=ED=AD-AE=4500-1500=3000m

Speed=distance travelled/time=3000/15=200m/sec

Find the answer to a similar type of question in the following link

https://learn.careers360.com/school/question-the-angle-of-elevation-of-an-aeroplane-from-a-point-a-on-the-ground-is-after-a-flight-of-seconds-the-angle-of-elevation-changes-to-if-the-plane-is-flying-at-a-constant-height-of-metres-find-the-speed-of-the-aeroplane-103411/

Preparation Products

JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Buy Now
Rank Booster NEET 2021

This course will help student to be better prepared and study in the right direction for NEET..

₹ 13999/- ₹ 9999/-
Buy Now
Knockout JEE Main April 2021 (Subscription)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
Buy Now
Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout NEET May 2022

An exhaustive E-learning program for the complete preparation of NEET..

₹ 34999/- ₹ 24999/-
Buy Now
Exams
Articles
Questions