Question
The angle of depression of the foot of a building from
the top of a tower 54√3 m away is 30°. How high is the tower?Solution
=> tan A = height/base => tan 30 = height/54 √3 => 1/√3 = height/54 √3 => height = 54 √3/√3 => height = 54 m
Six years ago, A was four times as old as B. Six years from now, A will be twice as old as B. Find their present ages.
The ratio of the present ages of ‘X’ and ‘Y’ is 9:4. If the present age of ‘Y’ had been 12 years more, then his present age would have been ...
Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
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 Present ages of A and B are in the ratio 5:7. After 8 years, their ages will be in the ratio 7:9. What is the sum of their present ages?
Present age of a Father is three times more than the age of his son. If six years ago, their ages were in ratio 7:1, respectively, then find the present...
Present age of X is 60% more than that of Y. Present age of Z, who is 5 years older than Y, is 25 years. After how many years from now, ratio of ages of...
"Amit and Bishnu's current ages are in the ratio 4:5. Chintu's age is 40% more than Amit's age. If Bishnu and Chintu's ages sum up to 106 years, what is...
A is younger than B by 3 years. If the ratio of A and B ages is 7:10 respectively, then find the age of A.
The present age of Surjeet and Rakesh are in the ratio of 4:5. After 8 years the ratio of their ages will be 6:7. What is 70% of the sum of their presen...
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