Question

The difference between length and breadth of a rectangular plot is 4. If its perimeter is 84 m, what is its area ? (in mº)
0385
0437
O 427
397
0 391​

Answer 1

Answer:

437 metre square

Step-by-step explanation:

Let the breadth be x

Lengh is = x+4

Perimeter = 2( length + breadth)

= 2 (x+4+x)

= 2(2x +4 )

So,

2 (2x+4) = 84

or, 2x+4 = 42

or, 2x = 38

or, x= 19

Breadth = 19 m

Length = 23 m

Area = (19×23) metre square

= 437 metre square

Answer 2

Let length be 'L' ...

Breadth will be 'L+4'...

Perimeter = 2L + 2b

84 = 2L + 2 (L+4)

84= 2L + 2L +8

92= 4L

L = 23 m.............

b = L-4 = 19m......

Area = L×b

= 23× 19

= 437m^2