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Abhi077
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08 Dec 2020, 05:27
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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The length of the edging which surrounds garden A which is in the shape of an equilateral triangle, that which surrounds the rectangular garden B, and that which surrounds the circular garden C are the same. What is the ratio of the length and the width of B? (Assume p = 3.14)
(1) The radius of C equals one of the dimensions of B.
(2) The side of A equals 3/p times one of the dimensions of B.
(1) The radius of C equals one of the dimensions of B.
(2) The side of A equals 3/p times one of the dimensions of B.
10 Dec 2020, 22:42
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Abhi077
What the question statement means is - The circumference of circle and perimeter of triangle and rectangle is same.
So \(2\pi r = 3a =2( l+b)\)
(1) The radius of C equals one of the dimensions of B.
so r is equal to l or w. Generally the larger is length and smaller the breadth/width.
\(2\pi r = 2(l+b)........\pi * b = l+b........3.14b-b=l.......2.14b=l........\frac{l}{b}=2.14\)
Suff
(2) The side of A equals 3/p times one of the dimensions of B
\( 3a = 2(l+b)............3*\frac{3}{3.14}l=2(l+b)...........3*\frac{3}{2*3.14}l-l=b.........(\frac{9}{6.28}-1)*l=b...........\frac{2.72}{6.28}=\frac{b}{l}..........\frac{l}{b}=\frac{6.28}{2.72}=2.3\)
Suff
D
You can avoid calculations the moment you know that you are getting a value of l/b
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Updated on: 17 Dec 2020, 21:37
Originally posted by ShankSouljaBoi on 11 Dec 2020, 00:38.
Last edited by ShankSouljaBoi on 17 Dec 2020, 21:37, edited 1 time in total.
Last edited by ShankSouljaBoi on 17 Dec 2020, 21:37, edited 1 time in total.
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chetansharma
Hi,,,
if l > b is not true , which is quite possible... we ' ll get A . Are you satisfied with the question ???
Best
