A girl of height 90cm is walking away fr...

A girl of height `90cm` is walking away from the foot of a lamp-post at a speed of `1.2m//sec`. If the lamp is at a height of `3.6m` from the ground, then the length of the shadow of the girl after 4 sec is

`4.8m`

`2.4m`

`1.6m`

`0.8m`

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CALCUTTA BOOK HOUSE-SIMILARITY-Exercise 5.1

In the following figure , /P=
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A girl of height 90cm is walking away from the foot of a lamp-post at ...
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In the figure beside , DeltaODC~DeltaOBA, /BOC=125^(@) and /CDO=70^(@)...
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In DeltaPQR the straight line parallel to QR intersects the sides PQ a...
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In the DeltaPQR, a straight line parallel to QR intersects the sides P...
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In DeltaPQR, PQ=24cm, PR=32cm and PS is the bisector of /QPR, where QS...
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In DeltaABC, (AB)/(AC)=(BD)/(DC). If /B=70^(@) and /C=50^(@) , then /B...
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In DeltaABC, D and E are two such points on the sides AB and AC respec...
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In DeltaABC the straight line DE parallel to BC intersects the other t...
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In DeltaABC, a straight line parallel to BC intersects the sides AB an...
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The straight line parallel to the side BC of DeltaABC intersects the s...
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If a straight line divides any two sides (or their extended sides) of ...
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If two or more than two triangles be equiangular and the ratios of the...
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If the shapes and sizes of two or more than two triangles be the same,...
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A straight line parallel to any side of any triangle divides other two...
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PQRS is a trapezium of which PS||QR. Its two diagonals PR and QS inter...
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In DeltaABC a straight line parallel to BC intersects the sides AB and...
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The line segments AB and PQ intersect each other at the point C. AP an...
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In DeltaPQR, /QPR=90^(@) and PDbotQR. If PR=8cm and PQ=6cm, then find ...
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In trapezium PQRS, PQ||SR. If PQ=6cm, SR=9cm and QS=15cm and the point...
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