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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? How many dots are there if there are 8 rows? If there are 10 rows?

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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Time and work rate problems

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Q. 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?

Calculate total dots: Radha has $9$ dots in a row. For $r$ rows, the total number of dots will be $9$ times $r$ . $\newline$ Total dots = $9 \times r$
Total dots for $8$ rows: Calculate the total number of dots for $8$ rows. $\newline$ Total dots for $8$ rows = $9 \times 8$ $\newline$ Total dots for $8$ rows = $72$
Total dots for $10$ rows: Calculate the total number of dots for $10$ rows. $\newline$ Total dots for $10$ rows = $9 \times 10$ $\newline$ Total dots for $10$ rows = $90$

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