Prakash M.

B.Tech. Graduate

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Geometry

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Question:

From a point P on a level ground, the angle of elevation of the top tower is 45 degree. If the tower is 100 m high, what is the distance of point P from the foot of the tower?

Prakash M.

Answer:

We have given angle from ground level to the top of the tower = 45 degree Height of tower = 100 m Height / Base = tan (45) = 1 => Base = Height / tan(45) => Base = 100/1 => Base = 100 m

Civil Engineering

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Question:

A soil has bulk density 19 gm/cc ans water content 20 per cent. Calculate the dry density of soil sample.

Prakash M.

Answer:

Dry density = Bulk Density / (1 + Water Content) Dry Density = 19 / (1 + 0.20) Dry Density = 19 / 1.20 Dry Density = 15.833 gm/cc

Algebra

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Question:

Find zeros of given function: h(x) = | x - 9 | - 4

Prakash M.

Answer:

| x - 9 | - 4 = 0 | x - 9 | = 4 => (x - 9) = 4 or -(x - 9) = 4 => x = 13 or 9 - x = 4 => x = 13 or x = 5

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