Question
The angle of elevation of the top of a building from the
foot of a tower is 30° and the angle of elevation of the top of the tower from the foot of the building is 60°. If the height of the tower is 42 m, what is the height of the building?Solution
Let AB and CD denote the tower and the building respectively. In △ABC, tan 60° = AB/BC ⇒ √3 = 42/BC ⇒ BC = 42/√3 m In △BCD, tan 30° = CD/BC ⇒ 1/√3 = CD/(42/√3) ⇒ CD = 14 m ⇒ h = 14 m
If A = 26 and T = 7, then AUTHENTIC = ?
The second number in each of the number-pairs is obtained by performing certain mathematical operations on the first number. Three of the following four...
Select the correct mirror image of the given figure when the mirror is placed to the right side of the f igure .
In the following question, two statements are given and these statements are followed by four conclusions. You have to take the given two statements to ...
Identify the image of the image given with the following options:
Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left...
If 84 × 13 = 8, 37 × 13 = 6, 26 × 11 = 6, then 56 × 22 = ?
Select the correct set of symbols:
21 9 13 7 = 195
Select the option that is related to the fifth word in the same way as the fourth word is related to the third word and the second word is related to th...
Select the option that is related to the third word in the same way as the second word is related to the first word.
Fuel : Diesel : : Utensils : ?
