Question

find the perimeter of a rectangle whose area=1050 cm , length=35 cm

Answer 1

perimeter of rectangle =2{width+length}
but we know that area of rectangle is l.b
area=l*b
breadth =area /length
b=1050/35 once u get breadth
substitute in the formula of perimeter u will get it

Answer 2

perimeter of a rectangle =2×{l+b}

breadth=1050÷35=30
therefore 2×(l+b)=
2×65
=130