A photo is printed on a 20-inch by 24-inch piece of paper. The photo covers 320 square inches and has a ubiform border. What is the width of
the border?

2 in.

Step-by-step explanation:

Given

Dimension of photo frame is

If the photo cover an area of

Suppose x be the width of border

Therefore dimension of frame without border is

And must be equal to

So,

Thus there are two values of x out of which is not valid because it is not feasible

thus width of border is

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step-by-step explanation:

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.