Question

Perimeter of a rectangle is 110 cm and its length is 35 cm. what is the breath?

Answer 1

perimeter of rectangle=2(l+b)=110 cm
l+b=110/2
35+b=55
b=55-35
b=20cm

Answer 2

$given \: perimeter \: of \: the \: rectangle = 110 \: cm \\ \\ let \: the \: breadth \: of \: the \: rectangle = b \\ \\ given \: length \: of \: the \: rectangle \:( l) = 35 \: cm \\ \\ therefore \: perimeter \: of \: the \: rectangle \\ \\ = 2(l + b) \\ \\ so \: according \: to \: question \\ \\ 2(l + b) = 110 \\ \\ = > 2(35 + b) = 110 \\ \\ = > 35 + b = \frac{110}{2} \\ \\ = > 35 + b = 55 \\ \\ = > b = 55 - 35 \\ \\ = > b = 20 \: cm$


hope it helps.....