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Maths

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Maths

Postby poojasharma » Sun Feb 21, 2010 11:01 am

Three horses are tethered at 3 corners of a triangular plot having sides 20m, 30m and 40 m with ropes of 7m length each. Find the area of the plot which can be grazed by the horses. Ans is 77 m2
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Re: Maths

Postby tennisanu » Tue Feb 23, 2010 11:54 am

easy!!

in a triangle sum of all the angles = 180
therefore the total area that can grazed by all 3 horses is a semicircle with radius 7m.

ar(semicircle) = (22/7)*7*7/2
=11*7
= 77
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Re: Maths

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Re: Maths

Postby ramsey75 » Wed May 26, 2010 12:22 pm

tennisanu wrote:easy!!

in a triangle sum of all the angles = 180
therefore the total area that can grazed by all 3 horses is a semicircle with radius 7m.

ar(semicircle) = (22/7)*7*7/2
=11*7
= 77

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