Question
A person from the top of a hill observes a vehicle
moving towards him at a uniform speed. It takes 10 minutes for the angle of depression to change from 45° to 60°. After this the time required by the vehicle to reach the bottom of the hill isSolution
[tan 45° = 1] [tan Q = P/B] [tan 60° = √3 / 1] = (√3 – 1) = 10 min = 1 → (10 / √3 – 1) = (10 / √3 – 1) × (√3 + 1) / (√3 + 1) = (10(√3 + 1)) / 2 = 5(√3 + 1) = 5√3 + 5 = 5 × 1.732 + 5 = 8.66 + 5 => 13.66 = 13 min 40sec Ans
Column (1)
Column (1)
In the following questions, you will find two columns containing three sentences each. Column 1 consists of sentences A, B, and C, with one blank in on...
Column (1)
Column (2)
(A) The Tourism Department had also
(D) for devotees taking the trek route.
(B) In a well coo...
Match Column I and Column II and choose the correct match from the given choice
Column (1)
In each of the following questions, two columns are given containing three sentences/ phrases each. A sentence or phrase from the first column may or m...
Column (1)
In the following questions two columns are given containing three Sentences/phrases each. In first column, sentences/phrases are A, B and C and in the ...
Match Column I and Column II and choose the correct match from the given choice
