You are given two
candles of equal size, which can burn 1 hour each. You have to measure
90 minutes with these candles. (There is no scale or clock). Also u r
given a lighter.

Ans: 1. First light up the two ends of the 1st candle. When it will burn
out light up one end of the second candle. (30+60=90)

You r given a
thermometer. What can u do by this without measuring the temperature?

Ans: if u put thermometer into a tree it won't grow anymore, will just
die off

You are a landscape
designer and your boss asked u to design a landscape such that you
should place 4 trees equidistance from each other.

(Distance from each tree to the other must be same)

Ans: Only 3 points can be equidistant from each other. But if u place
points in the shape of a pyramid then its possible

You are given a
cake; one of its corner is broken. How will u cut the rest into Two
equal parts?

Ans: Slice the cake

How will you
recognize the magnet & magnetic material & non-magnetic material?

Ans: Drag one piece of material over another. There is no attractive
force in the middle portion of the magnet. OR

Get a piece of thread and tie up with the one bar and check for poles.
If it iron bar then it moves freely and if it is magnetic bar then it
fix in one direction according to poles.

If one tyre of a car
suddenly gets stolen and after sometime u find the tyre

without the screws how will u make ur journey complete?

Ans: Open 3 screws, 1 from each tyre and fix the tyre.

How can u measure a
room height using a thermometer?

Ans: temp varies with height. but its dependent on various other factors
like

humidity, wind etc.

What is the height
of room if after entering the room with a watch ur head

strikes a hanging bulb?

Ans: Oscillate the hanging bulb. Calculate the time period for one
complete

oscillation by Simple Harmonic Motion (SHM) of the handing bulb. Put it
in the

formula T=2 * 3.14 * (L/G)^1/2

L will be the length of the hanging thread.

Add the L with ur height to get the height of the room.

How will you measure
height of building when you are at the top of the building? And if you
have stone with you.

Ans: Drop the stone and find the time taken for the stone to reach the
ground. find height using the formula

s = a + gt ( s = height, a= initial velocity=0, g=9.8m/s, t = time
taken)

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