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# Radha is drawing a dot Rangoli (a beautiful pattern of lines joining dots) with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for r rows?

Q. 7.     Radha is drawing a dot Rangoli (a beautiful pattern of lines joining dots) with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for $r$ rows? How many dots are there if there are $8$ rows? If there are $10$ rows?

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Number of rows = r

Number of dots in each row  = 9 dots

Thus, the total number of dots = 9r

When the number of rows is 8, then the total number of dots are $9\times8 =72$ dots.

When the number of rows is 10, then the total number of dots are $9\times 10=90$ dots.

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