From the top of a light-house at a height 20 metres above sea-level, the angle of depression of a ship is $30^{0}$. The distance of the ship from the foot of the light house is

From the top of a light-house at a height 20 metres above sea-level, the angle of depression of a ship is $30^{0}$. The distance of the ship from the foot of the light house is
1). 20 m
2). $20\sqrt{3}$ m
3). 30 m
4). $30\sqrt{3}$ m

SSC CGL Books

---

Join Telegram Group

Answer This Question
Name:
Email:
Answer :
Sum of (2+2)
Submit:

Other Questions

1. A tree of height ‘h’ metres is broken by a storm in such a way that it’s top touches the ground at a distance of ‘ x ’ metres from its root. Find the height at which the tree is broken, (Here h > x )

2. If cot A = $\left[\frac{sin B}{(1 - cos B)}\right]$, then what is the value of cot 2A?

3. If a $\triangle ABC$ ,$\angle B$ = $\frac{\pi}{3}$ ,$\angle C$ = $\frac{\pi}{4}$ ,and D divides BC internally in the ratio 1 : 3 then $\frac{sin\angle BAD}{sin\angle CAD}$ to equal to

4. Find the Minimum value of 8 tan 2x + 7 cot 2x

5. If cotθ = 3 then find the value of the expression \(\frac{{9{\rm{sin\theta \;}} + {\rm{\;}}7{\rm{cos\theta \;}}}}{{{\rm{co}}{{\rm{s}}^3}{\rm{\theta \;}} + {\rm{\;}}3{\rm{si}}{{\rm{n}}^3}{\rm{\theta \;}} + {\rm{\;}}5{\rm{sin\theta \;}}}}\)

6. A man travels 404 kilometres in partly by rail and steamer. He spends 10 hours more time on steamer. If the speed of the steamer is 30 km/hr and the velocity of rail is 50 km/hr, how much distance does he cover by steamer?

7. If PQ and PR be the two tangents to a circle with centre O such that ∠QPR = 120° then ∠POQ is

8. The base of a triangle is $12\sqrt{3}$ cm and two angles at the base are $30^{0}$ and $60^{0}$ respectively.The altitude of the triangle is

9. If (cotA – tan A)/2 = x, then the value of x is

10. How long does a train, 75 m long, moving at 60 km/hr take to pass a certain telegraph post?