There is a fire in the building. A man on the top of the building see a Fire brigade van coming towards it. If it takes 8 minutes for the angle of depression to change from 30⁰ to 60⁰, how soon will the van reach the building?
Let the height of the building be h. D the man standing on the top of the building. Now, from figure, AB = x and BC = y tan 60⁰ = h/y h = y√3 And tan 30⁰ = h/(x+y) 1/√3 = (y√3)/(x+y) 3y = x+y 2y = x y = x/2 Since, Time taken to cover a distance from A to B = 8 minutes ∴ Time taken to cover a unit distance = 8/x minutes For distance ‘y’ time taken = 8/x × y = 8/x × x/2 = 4 minutes.
Given the following Input:
“She was selected for her work to encourage”, what would be the step VI of the input?
Input for Qs. 6 - 10: 28 33 92 35 73 46 84 11
How ma...
Input for Qs. 6 - 10: 28 33 92 35 73 46 84 11
In ste...
Which of the following steps is the given output?
18 empower 46 provider 77 general 93 opinion
Which element is exactly between “course” and “85” in the second step of the given arrangement?
The entry codes for which of the following batches of Tuesday will not change on Thursday?
Which number would be at the fourth position from the left end in the last step of the output?
Step II of an input is: table 74 parrot 14 32 neat jackal 42
Which of the following is definitely the input?
Which element is fifth to the left of the element which is ninth from the left end of the fourth step?
Input for Qs. 6 - 10: 28 33 92 35 73 46 84 11
Which ...