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CBSE Class 12-science Answered

pls provide solution
Asked by saisidh05 | 04 Jul, 2022, 03:04: PM
Expert Answer
Let x be the side and A be the area of an equilateral triangle.
rightwards double arrow straight A equals fraction numerator square root of 3 over denominator 4 end fraction straight x squared space space space... space left parenthesis straight i right parenthesis
rightwards double arrow dA over dt equals fraction numerator square root of 3 over denominator 4 end fraction cross times 2 straight x cross times dx over dt space space space space space space... space left parenthesis ii right parenthesis
Since comma space dA over dt equals 4 space sq space cm space and space straight A equals 4 square root of 3 space sq space cm
When space straight A space equals space 4 square root of 3 space sq space cm space
rightwards double arrow space 4 square root of 3 equals fraction numerator square root of 3 over denominator 4 end fraction straight x squared space space space space space space space space space... space From space left parenthesis straight i right parenthesis
rightwards double arrow straight x squared equals 16 space sq space cm
rightwards double arrow straight x equals 4 space cm
From space left parenthesis ii right parenthesis comma space we space get
4 space sq space cm equals fraction numerator square root of 3 over denominator 4 end fraction cross times 2 left parenthesis 4 right parenthesis space cm space cross times dx over dt
rightwards double arrow dx over dt equals fraction numerator 16 over denominator 8 square root of 3 end fraction space cm
rightwards double arrow dx over dt equals fraction numerator 2 over denominator square root of 3 end fraction space cm
Answered by Renu Varma | 07 Jul, 2022, 10:53: AM
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