Aptitude - Height and Distance - Discussion
Discussion Forum : Height and Distance - General Questions (Q.No. 2)
2.
A man standing at a point P is watching the top of a tower, which makes an angle of elevation of 30° with the man's eye. The man walks some distance towards the tower to watch its top and the angle of the elevation becomes 60°. What is the distance between the base of the tower and the point P?
Answer: Option
Explanation:
One of AB, AD and CD must have given.
So, the data is inadequate.
Discussion:
43 comments Page 2 of 5.
Rajashekar said:
5 years ago
The answer is simple. (3 units).
tan30 = x / a +b
=> x = a + b /√(3)
tan60 = x / b
=> x = √(3) b
Hence,
a + b /√(3) = √(3) b
a + b = √(3) * √(3) * b
a + b = 3b,
a = 2b.
Therefore, 2b + b = 3b, in terms of b we get ANSWER as 3 UNITS.
THANK YOU
tan30 = x / a +b
=> x = a + b /√(3)
tan60 = x / b
=> x = √(3) b
Hence,
a + b /√(3) = √(3) b
a + b = √(3) * √(3) * b
a + b = 3b,
a = 2b.
Therefore, 2b + b = 3b, in terms of b we get ANSWER as 3 UNITS.
THANK YOU
(13)
Shashi Kumar said:
6 years ago
Value of H is not given, without the value of h we can't find the distance between base of the tower and the point P that's why answer is Option D.
(4)
Deepak said:
6 years ago
Can you please explain briefly. I am not getting the point.
Mamta puri said:
7 years ago
Please explain it briefly.
Jaidev said:
7 years ago
No, @Jhanvi.
If you take h as the height of the tower, b as the distance from P to the base of the tower and when the person walks to a new point lets say Q, so take x= distance from Q to base of the tower. Now solving these we have tan30=h/b and tan60=h/x. We are left with 3 unknowns and only two equations. Therefore the solution cannot be found.
If you take h as the height of the tower, b as the distance from P to the base of the tower and when the person walks to a new point lets say Q, so take x= distance from Q to base of the tower. Now solving these we have tan30=h/b and tan60=h/x. We are left with 3 unknowns and only two equations. Therefore the solution cannot be found.
Lokesh said:
7 years ago
Inadequate data. Some distance or meter should be there to predict the answer.
Jhanvi said:
7 years ago
The Answer should be 4 units.
Ankush sapehia said:
7 years ago
The Answer is D.
Harry grewal said:
7 years ago
No, the Information is inadequate. Moreover, the graph is also wrong.
The angle must be made from man's eye, not from the foot. The person is in standing position. Not laying on the ground.
The angle must be made from man's eye, not from the foot. The person is in standing position. Not laying on the ground.
K santhosh said:
7 years ago
Tel me the length of point of men standing to point A.
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