Question
There are two houses of the same height on both sides of
a 30-meter wide road. From a point on the road, elevation angles of the houses are 30° and 60° respectively. Find the height of the houses.Solution
Let y be the height of the houses, here AB = CD = y meter. Let x be the distance between the point on the road and the house making an elevation angle of 60°, here BE = x meter. Then, (30 - x) is the distance between the point on the road from the house making an elevation angle 30°, here DE = (30 - x) meter. Now, tan 60° = AB/BE ⇒ √3 = y/x ⇒ x = y/√3 ...(i) Also, tan 30° = CD/DE ⇒ 1/√3 = y/(30 - x) ⇒ √3y = 30 - x ⇒ √3y = 30 - y/√3 [from equation i] ⇒ 3y = 30√3 - y ⇒ 4y = 30√3 ⇒ y = 30√3/4 ≈ 12.9 meter
1) Pictureque
2) Costomary
3) Descendant
4) Benovolent
It's many years ____________ Mount Vesuvius last erupted.
Many travellers approach Lahaul and Spiti
P- via the 3978m-high Rohtang La pass,
Q- tourism hub of Manali
R- which rises north of the
The complete loss or absence of hope
Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph.
...
I stop by a souvenir shop and __________ of sweet chocolates.
That book contains many interesting stories.
I wanted to visit the art museum , but it was closed for maintenance unless next month.
Why did that officer neglect his duties?
Let us have it please.
Relevant for Exams:
