Question

. The perimeter of a rectangle is 42 cm and its length is double its breadth. Find the length
and breadth of the rectangle.
The chortert side of a triannular sarden is ?n m Its perimeter is 139 m and its longest side​

Answer 1

Answer:

breadth=x

length=2x

perimeter=42cm

perimeter=2(l+b)

42=2(2x+x)

42/2=3x

21=3x

21/3=x

7=x

length=2x

=2*7

=14cm

breadth=x

=7cm

Answer 2

Answer:

let the length be 2x

then breath be x 2(L+B)=perimeter of rectangle 2(2x+x)=42 2(3x)=42 6x=42 x=42÷6 x=7 length be 2x = 2×7 = 14 cm breath be x = 7 cm