An aeroplane when 900 m high passes vertically above anot...
381 m
169 m
254 m
211 m
The angle of elevation of the top of the tower from a point on the ground is sin\(^{-1}\)(\(\frac{3}{5}\)). If the point of observation is 20 meters away from the foot of the tower, what is the height of the tower?
9 m
18 m
12 m
15 m
If A\(_1\) is the area of the parabola y\(_2\)= 4ax lying between vertex and the latus rectum and A\(_2\) is the area between the latus rectum and the double ordinate x = 2a, then A\(_1\) / A\(_2\) is equal to.
(2 \(\sqrt{}\)2 -1)
\(\frac{1}{7}\)(2 \(\sqrt{}\)2 + 1)
\(\frac{1}{7}\)(2 \(\sqrt{}\)2 -1)
None of these
A body of mass m0 is placed on a smooth horizontal surfac...
ue\(^{\lambda t}\)
uλt
ue\(^-{\lambda t}\)
u(1-e \(^-{\lambda}\)\(^t\))
A uniform chain of length L and mass M is lying on a smoo...
MgL
MgL/3
MgL/9
MgL/18
An open pipe of sufficient length is dipping in water wit...
cv/2l\(^2\)
cv/4l\(^2\)
c/2v\(^2\) l \(^2\)
c/4v\(^2\) l \(^2\)
A magnet of moment M is lying in a magnetic field or induction B. W\(_1\) is the work done in turning it from 0 to 60 degree &W\(_2\) is the work done in turning it from 30\(^0\) to 90\(^0\) . Then
W\(_2\)=W\(_1\)
W\(_2\)=W\(_1\)/2
W\(_2\)= 2W\(_1\)
W\(_2\)= \(\sqrt{3}\) W\(_1\)
Two coherent sources of different intensities send waves ...
25:1
5:1
9:4
625:2
The relative density of a metal may be found by hanging a...
(5.00 ± 0.05)
5.00 ± 11%
(500 ± 0.10)
5.00 ± 6%
The equation of a line through the point of intersection of the lines x – 3y + 1 = 0 and 2x + 5y – 9 = 0 and whose distance from the straight is \(\sqrt{5}\) is .
2x + y – 5 = 0
2x – y + 5 = 0
2x + y – 10 = 0
2x – y – 10 = 0
To a man standing outside his house, the angles of elevat...
8.65 m
2 m
2.5 m
3.65 m
Please help me to find the equation of the circles which pass through the ends of the common chords of two circles 2x\(^2\)+ 2y\(^2\) + 8x + 4y – 7 = 0 and x\(^2\) + y\(^2\)– 8x – 4y – 5 = 0 and touch the line x = 7.
x \(^2\) +y\(^2\) +120x-60y+11=0
x \(^2\) +y\(^2\) -120x-60y+11=0
x \(^2\) +y\(^2\) +120x+60y+11=0
x \(^2\) +y\(^2\) +120x-60y-11=0
A five-digit numbers divisible by 3 is to be formed using...
216
240
600
3125
The plane ax + by = 0 is rotated through an angle α...
ax + by ± z √(a\(^2\) +b\(^2\) ) tan α = 0
(ax + by) √(a\(^2\) +b\(^2\) ) ± z tan α = 0
(ax + by) tan α ± z √(a\(^2\) +b\(^2\) ) = 0
ax + by ± √(a\(^2\) +b\(^2\) ) z = tan α
A flagstaff stands in the centre of a rectangular field whose diagonal is 1200m and subtends angles 15\(^0\) and 45\(^0\) at the midpoints of the sides of the field. What would be the height of the Flagstaff? Please help me to find the correct answer.
200m
300√(2+√3)m
300√(2-√3) m
400m
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