Question

Q.1 The area of rectangular picture frame is 63 cm². If the length of the rectangular picture
frame is 7 cm
a) Find the breadth of the rectangular picture frame.
b) Find the perimeter of rectangular frame

Answer 1

Step-by-step explanation:

Area of picture = 6 cm × 8 cm = 48 cm² Area with frame = 7 cm × 9 cm = 63 cm² Area of the frame = (63 - 48) = 15 cm².

Answer 2

Correct Question:-

• The area of rectangular picture frame is 63 cm². If the breadth of the rectangular picture frame is 7 cm. Find the length of the rectangular picture frame and find the perimeter of rectangular frame.

To Find:-

• Find the length of rectangular picture frame.

Solution:-

Given ,

• Area of rectangle is 63 cm².

• Breadth of rectangle is 7 cm.

Now ,

We have to find the length of rectangle:-

$\longrightarrow\sf \: Area_{ ( rectangle ) } = length \times breadth$

$\longrightarrow\sf \: 63 = l \times 7$

$\longrightarrow\sf \: 7l = 63$

$\longrightarrow\sf \: l = \cancel\dfrac { 63 } { 7 }$

$\longrightarrow\sf \: l = 9 \: cm$

Now ,

We have to find the perimeter:-

$\longrightarrow\sf \: Perimeter_{ ( rectangle ) } = 2( l + b )$

$\longrightarrow\sf \: Perimeter = 2( 9 + 7 )$

$\longrightarrow\sf \: Perimeter = 2( 16 )$

$\longrightarrow\sf \: Perimeter = 32 \: { cm }^{ 2 }$

Hence ,

• Perimeter is $\sf \: 32 \: { cm }^{ 2 }$