Question

Answer this questions properly with steps if you know otherwise don't . Don't Spam .....⚠️​

Answer 1

Question :

The area of rectangle as shown in the Fig. is

a) 30 cm²

b) 300 dm²

c) 3 cm²

d) 3 dm²

Given :

• Breadth of rectangle = 12 cm
• Length of rectangle = 2.5 dm

To find :

• Area of rectangle

According to the question,

Note : We have to change Breadth of rectangle into dm,

• Breadth of rectangle = 1.2 dm

➞ Area of rectangle = Length × Breadth

➞ Area of rectangle = 2.5 dm × 1.2 dm

➞ Area of rectangle = 3 dm²

• So,the area of rectangle is 3 dm².

So, option d) 3 dm² is correct.

___________________

Note : For figure refer to the attachment.

MORE FORMULAS :-

• Area of rectangle = Length × Breadth
• Area of square = Side × Side
• Surface area of a cube = 6a²
• Surface area of cuboid = 2(lb + bh + hl)
• Volume of cuboid = l × b × h
• Total surface area of a hemisphere = 3πr²
• Curved surface area of a cone = πrl
• Total surface area of a cylinder = 2πr(r + h)

Answer 2

✦Your Answer:-

$\longrightarrow{ \underline{ \boxed{ \sf{3 \: {dm}^{2} }}}}$

✦Given:-

➯The breadth of the rectangle is 2.5 dm.

➯The height of the rectangle is 12 cm.

✦To Find:-

➯The area of the rectangle.

✦Solution:-

➯First let's change the cm to dm. Because our answer is in the form of dm.

$\longrightarrow { \underline{ \boxed{ \sf{height \: = \frac{12}{10} = 1.2 \: dm }}}}$

$\longrightarrow { \underline{ \boxed{ \sf{breadth \: = 2.5 \: dm }}}}$

➯To Find the area of the rectangle,

➯Using formula,

$\longrightarrow \bigstar{ \underline{ \boxed{ \boxed{ \sf{ \pink{area \: of \: the \: rectangle = length \times breadth}}}}}} \bigstar$

$\longrightarrow { \underline{ \boxed{ \sf{area \: of \: the \: rectangle \: = 1.2 \times 2.5 }}}}$

$\longrightarrow \bigstar{ \underline{ \boxed{ \boxed{ \sf{ \pink{area \: of \: the \: rectangle = 3 \: dm}}}}}} \bigstar$

➯Hence, The area of the rectangle is 3dm².