Question

1.Findperimeterofarectangularlawnwhoselengthis20m40cmandbreadthis12m20cm.

Answer 1

Answer:

120.64cm. first multiply 20 by 2

Answer 2

Correct Question

• Find perimeter of a rectangular lawn whose length is 20m 40cm and breadth is 12m 20cm.

Given:

• Length (l) = 20m 40cm $\implies$ 20.4 m
• breadth (b) = 12m 20cm $\implies$ 12.2 m

To Find:

• Perimeter (Rectangular Lawn)?

Formula Used:

$\\ \bigstar{\underline{\boxed{\tt\large{ \green{Perimeter_{(Rectangle)} } = 2(l + b) }}}}$

Where

• l = Length
• b = Breadth

Solution:

After substituting values,

$\implies$ P = 2(l + b)

$\implies$ P = 2(20.4 + 12.2)

$\implies$ P = 2( 32.6)

$\implies$ P = 2 × 32.6

$\implies$ P = 65.2 m

Hence,

• The Perimeter of the Rectangular Lawn is 65.2 m.

$\bigstar{\underline{\tt\pink{ Formula \ related \ to \ Rectangle :- }}}$

$\\ \bullet \: \: {\sf\red{ Perimeter_{(Rectangle)} = 2(l + b) }} \\ \\ \bullet \: \: {\sf\large\red{ Area_{(Rectangle)} = l \times b }} \\ \\ \bullet \: \: {\sf\large\purple{ Diagonal_{(Rectangle)} = \sqrt{ l^2 + h^2 } }}$