Question

The perimeter of a rectangle is 390cm and the length is 30cm. Find its breadth and area

Answer 1

$\mathfrak{hello \: friend} \\ your \: answr \: is \: \\ perimeter \: of \: rect = 2( l+ b) = 390\\ (l + b) = 390 \div 2 = 195 \\ 30 + b = 195 \\ \mathtt{ b = 195 - 30 = }\mathtt{ 165}$