NIELIT 2018-8

Question

Let us consider the length of the side of a square represented by $2y+3$. The length of the side of an equilateral triangle is $4y$. If the square and the equilateral triangle have equal perimeter, then what is the value of $y$?

• A. $3$
• B. $4$
• C. $6$
• D. $8$

Answer 1

It is given that perimeter are equal so

4*side(square)=3*side(triangle)

4*(2y+3) = 3*(4y)

8y+12=12y

4y=12

y=3

Correct answer is A

Answer 2

parameter of square - 4 *(length of one side) = 4 *(2y +3) == 8y + 12.

parameter of triangle - a+b+c = 4y

 

8y +12 = 0

4y +0 = 0

(-)  (-)

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4y =  12

y = 3