Question
Two buildings are 40 meters apart. The height of one
building is 20 meters. From the top of the shorter building, the angle of elevation of the top of the taller building is 45°, and the angle of depression of its base is 30°. Find the height of the taller building.Solution
Let the height of the taller building be H meters. The height difference between the two buildings is (H - 20) meters. From the angle of elevation: tan 45° = (H - 20) / 40  1 = (H - 20) / 40  H - 20 = 40  H = 60 m. Answer: c) 60 m
The probability of selecting a rotten egg randomly from a basket of 1050 eggs is 0.36. What is the number of rotten eggs in the basket?
Ten tickets numbered 1 to 15 are placed in a box, mixed up thoroughly and then one ticket is drawn randomly. If it is known that the number on the drawn...
- Find the probability of selecting a face card from a deck of well shuffled cards.
Find the probability that a number selected at random from first hundred number is a multiple of 3 or 5?Â
A box contains (x + 3) black balls, 6 yellow balls, and 5 orange balls. If two balls are selected at random and the probability of selecting two orange ...
If a coin is tossed 10 times then what is the probability of getting three heads?
- The probability that Riya passes the test is (4/9) and the probability that Aditya fails is (1/3). If both appear for the test, find the probability that t...
The names of 15 students from section A, 10 students from section B and 15 students from section C were selected. The age of all the 40 students was dif...
A coin is tossed successively three times. Find the probability of getting exactly one tail or two tails?
What is the Probability of getting a sum of ‘9’ on rolling a dice twice?
Relevant for Exams:
