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2015-03-04T02:14:34+05:30

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Mayb it's like this,,

l^2 = h^2 + r^2 = 576 + 49 = 625
l = 25
now,
ar. of cloth = l.s.a of tent
2.5 * length = 22/7 * 7 * 25 
hence length = 220 m 
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2015-03-04T07:23:09+05:30
Use pythagarous theorm

l^2 = h^2 + r^2
so you get l=25
that is required height
by this problem
you form eqn
 cloth area= l.s.a of tent
2.5 * length = 22/7 * 7 * 25 
solving the equation
you get length is 220 m

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