Question
The angle of elevation of an aeroplane from a point on
the ground is 60°. After 15 seconds flight the elevation changes to 30°, if the aeroplane is flying at a height of 2400√3 m. find the speed of the aeroplane.Solution
Distance between two place in which angle change is D = n(cotθ₁ + cotθ₂) Distance = 2400√3 (cot30° + cot60°) = 2400√3 × √3 - 1/√3 = 2400√3 × 2/√3 = 4800 m So, distance covered by plane in 15 sec = 4800 m Speed of plane = 4800/15 = 320 m/sec.
Choose the one which best expresses the meaning of the given word .
Nebulous
Choose the most appropriate synonym of the given word.
COGENT
The two parties signed a lengthy _________.
It took a lot of time in making both of them come to a comfortable mutual ___________.
Not man...
In each of the following sentences, choose the word opposite in meaning to the bold word to fill in the blank.
The soldier showed valor on ...
Although unwilling to do so, he came to the conclusion that no other scheme is practicable-
...Select the correct conclusion based on the meaning of the highlighted idiom:
Statement: Splitting hairs is futile and will not resolve our proble...
choose the option which represents a pair of either synonyms or antonyms.
Select the most appropriate synonym of the given word.
Aromatic
Select the most appropriate opposite of the Given word :
FORMER
- Choose the word similar in meaning to the given word:
Lugubrious
