Question

The area of rectangular lawn is 255m.sq. If it's length is 15m,find its perimeter.​

Answer 1

Answer:

64m

Step-by-step explanation:

Area of rectangle = Length × breadth

∴ 255 m.sq = 15m × breadth

∴ Breadth = 255/15 = 17m

Perimeter of rectangle = 2(length + breadth)

                                      = 2 (15+17)

                                      = 2(32)

                                      = 64mts

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Answer 2

$\huge{ \boxed{ \red{ \sf \: A}}}{ \boxed{ \red{ \sf{n}}}}{ \boxed{s}} \boxed {w}{ \boxed{e}}{ \boxed{r}}$

• Area of rectangle = length ×breadth
• Area of rectangle given=255 m².

To find:-

• Its perimeter

Before finding it's perimeter we will find it's breadth.

$\sf \: = l \times \: b = 255 {m}^{2}$

• Length given 15 m.

$\sf = 15 \times b = 255$

$\sf \: b = \frac{255}{15} = 17$

• Therefore the breadth is 17 m.

$\sf \: Perimeter \: of \: rectangle = \large \dag \pink{\boxed{2 \times (l + b}}$

$\sf \: 2 \times(15 + 17) = 64m$