Math, asked by vinaydugar8, 14 days ago

The sides of a triangle are (m+3n) cm,(3m+2n-2) cm and (4m+n/2+1) cm. If the triangle is equilateral triangle, find its perimeter​

Answers

Answered by rajnandini6d28
0

Answer:

Step-by-step explanation:

Correct option is

D

21 cm

Sides of equilateral Δ are (2a−b) cm, (a+3b) cm & (2a−2b+1) cm

As all the sides are equal.

∴2a−b=a+3b

a=4b

a+3b=2a−2b+1

a=5b−1

4b=5b−1

b=1 cm

∴a=4 cm

∴ Perimeter of equilateral Δ=2a−b+a+3b+2a−2b+1

=5a+1

=21 cm

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