Question
A vertical pole and a vertical tower are on the same
level ground in such a way that, from the top of the pole, the angle of elevation of the top of the tower is 60° and the angle of depression of the bottom of the tower is 30°. If the height of the pole is 24 m, then find the height of the tower (in m).Solution
Let, the height of the pole (AB) = CD = x m So, the height of ED = (76 - x) m So, In ΔACD, tan 30° = CD/AD ⇒ 1/√3 = x/AD ⇒ AD = √3x .....(1) In ΔAED, tan 60° = ED/AD ⇒ √3 = (76 - x)/√3x ⇒ 76 - x = 3x ⇒ 3x + x = 76 ⇒ 4x = 76 ⇒ x = 76/4 = 19 ∴ The height (in m) of the pole is 19 m
- Identify the INCORRECTLY spelt word in the following sentence and select its correct spelling from the given options.
The committee appreciated her... 1) Decietful
2) Desolate
3) Ingridient
4) Poisonus
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In the question below, a sentence is given, four words have been highlighted in bold. Find out if the words are appropriate (grammatically and contextu...
- Choose the word that is misspelled:
Choose the correct spelling of the words below.
Choose the correctly spelt word.
1) depraive
2) deprave
3) deprayve
4) deprawve
5) none of these
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