Question

3) What is a perimeter of equilateral triangle if each side of Triangle is 5 3/10 cm?​

Answer 1

$\huge \rm converting \: \: \: \: 5 \frac{3}{10} cm \\ \\ \\ \huge \rm⇒ \: \: 5 \frac{3}{10} cm \: = \: \frac{53}{10} cm$

so ,

$\rm perimeter \: \: of \: \triangle \: \: \: = \frac{53}{10} + \frac{53}{10} + \frac{53}{10} = \frac{159}{10} cm \\ \\ \\ \\ \\ \therefore \rm \: \: perimeter \: \: of \: \: \: equilateral \: \: \: \: triangle \: \: = \frac{159}{10} \: cm$