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Chapter 2: Q36. (page 99)

Watches A wristwatch has a built-in digital camera with a rectangular viewfinder. An image shown by the viewfinder consists of 6240 tiny rectangular dots called pixels arranged in rows and columns. The viewfinder has 80 rows of pixels. How many columns does it have?

Short Answer

Expert verified

Number of columns of pixels =78.

Step by step solution

01

Step-1- Write the formula from given information

Let x be the number of columns.

From given information, we came to know that,

Number of pixels = Number of rows ×Number of columns.

02

Step-2- Substituting values form given information

On substituting values, we get

Total number of pixels = number of rows ×number of columns.

6240=80×x

03

Step-3- Solve for value of x

Dividing with 80on both sides, we get

624080=80x80x=624080x=78

x=78

Therefore, number of columns of pixels =78.

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