Radha is drawing a dot Rangoli with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for r rows?

Number of dots in a row

Number of rows

Thus, the total number of dots in r rows= Number of dots in a row x number of rows = 9r

If there are 8 rows, then

Number of dots in 8 rows = 8x9 = 72

There will be 72 dots in 8 rows

And if there are 10 rows, the

Number of dots in 10 rows = 10 x 9 = 90

There will be 90 dots in 10 rows.

The number of dots in r rows is 9r, then there will be 72 dots in 8 rows and 90 dots in 10 rows.