Question

please solve the answer I give and mark you as brainleist person and you are as to me as Einstein.​

Answer 1

$\large\underline{\text{Answer}}$

The speed of the jet plane is 200 meters per second.

$\large\underline{\text{Solution}}$

Given information in the question:-

• The angle of elevation is 60° in the first observation.
• After 15 seconds, the angle of elevation is 30°.
• The height of the jet plane is 1500√3 km.

The trigonometric ratio is a ratio of two sides in the right triangle. Let's first draw a diagram to understand the problem. (Attachment Ⅰ)

$\hookrightarrow\overline{AB}=\overline{BH}-\overline{AH}$

$\hookrightarrow\overline{BH}-\overline{AH}=1500\sqrt{3}\times(\dfrac{1}{\tan 30^{\circ}}-\dfrac{1}{\tan 60^{\circ}})$

$\hookrightarrow\overline{BH}-\overline{AH}=1500\sqrt{3}\times(\sqrt{3}-\dfrac{\sqrt{3}}{3})$

$\hookrightarrow\overline{BH}-\overline{AH}=1500\sqrt{3}\times\dfrac{2\sqrt{3}}{3}$

$\large\hookrightarrow\red{\boxed{\red{\bold{\overline{AB}=3000\ (m)}}}}$

We know that,

$\large\hookrightarrow\red{\boxed{\red{\bold{Speed=\dfrac{Distance}{Time}}}}}$

So, using this,

$\hookrightarrow\text{Speed}=\dfrac{\overline{AB}}{15}$

$\hookrightarrow\text{Speed}=\dfrac{3000}{15}$

$\large\hookrightarrow\red{\boxed{\red{\bold{Speed=200\ (m/s)}}}}$

So, the speed of the jet plane is 200 meters per second.

Answer 2

Step-by-step explanation:

given :

• angle elevation from point A = 60 degree

• after a flight = 15 second

• angle elevation changes = 30 degree

• constant flying = 1500 √3

to find :

• speed of jet plane = ?

• speed of jet plane = ?

solution :

• jet plane flying the constant = 1500 √ 3

• Initially jet plane on A point after 15 second

• flight point B

• plane position after 15 sec

• ∆EBC from 30 degree = y/1500√3

• y/1500√3 = √3 ⇒ y = 1500 √3 x √3 = 4500

• ∆EDA from 60 degree = x/1500√3 = x/1500√3

• = 1/√3

• x= 1500

• Distance travelled in 15 seconds = (4500-1500) m = 3000 m.

• travelled in 1 second = 3000/15

• = 200 m

learn more :

• we will find in this question how much

• distance travelled

• and also find speed of jet finally

• we find in last distance

• so answer we will get