Question

Plz help me, im stuck on this question, It says

Answer 1

Answer:

Perimeter of rectangle =2(l+b)

=2(3*1/10+3/4)

=2(3/10+3/4) (lcm=40)

=2(12/40+30/40)

=2(42/40)

=42/20

= 21/10

=21/10 cm

Answer 2

$perimeter = 2(3 \frac{1}{10}) + 2 (\frac{3}{4})$

$perimeter = \frac{31}{5} + \frac{3}{2}$

$perimeter = \frac{62}{10} + \frac{15}{10}$

$perimeter = \frac{77}{10}$

$perimeter = 7 \frac{7}{10}$

The unit is just cm.

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I might not be right. Double check to make sure. Hope that gives you a general idea of how to do it.