Question

the length of a rectangle is twice its breadth..if its perimeter is 78 cm..find the length and breadth...

Answer 1

The perimeter of a rectangle is given by the formula 2*L + 2*B, where L is the length and B is the breadth.

Since L = 2*B, we can substitute this in the above equation to find the perimeter.

Thus, 2*2*B + 2*B = perimeter. Given perimeter is 78, we get

78 = 4*B + 2*B = 6*B.

Or B = 78/6 = 13.

And length L = 2*13 = 26cm.

Thus, the Length = 26cm and Breadth = 13cm.

Answer 2

hii...

let the breadth be x

then , length = 2x

perimeter of rectangle= 2( length+breadth)

=> 78= 2 ( 2x + x)

=> 6x = 78

=> x = 13

so, length = 2x = 26 cm and breadth =13 cm

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hope this helps!