Question

A photo graph 25cm by 20 cm is mounted on card os that there is margin of 2.5cm all the way round .what fractionof card is covered?

Answer 1

Hello!

Dimensions of photograph $\textbf{25 \:cm \:x\: 20\: cm}$

ATQ,

The photograph is mounted on the card.
There is a margin of 2.5 cm left at each corner of the card.

• Length = 25 cm + 2.5 cm + 2.5 cm = $\boxed{\sf 30 \:cm}$

• Breadth = 20 cm + 2.5 cm + 2.5 cm = $\boxed{\sf 25 \:cm}$

• Area of the card = 30 cm × 25 cm = $\boxed{\sf 750\: cm^{2}}$

• Area of the photograph = 25 cm × 20 cm = $\boxed{\sf 500\: cm^{2}}$

Then,

Fraction of card covered = $\dfrac{\sf 500\:cm^{2}}{\sf 750\:cm^{2}} = \dfrac{\sf 2}{\sf 3}$

Cheers!

Answer 2

Step-by-step explanation:

2/3 is the answer of this