Question

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?

Answer 1

Given, number of dots in each row of rangoli pattern is 9

Here, the number of rows is unknown.
Let r be the number of rows in the rangoli pattern.

Then. total number of dots in r rows will be product of number of dots in each row and number of rows

∴ Total number of dots in r rows = 9 × r

Thus, the general expression for this rangoli pattern will be 9r.