Question

Radha is drawing a dot Rangoli (a beautiful pattern of lines joining dots with chalk powder as in figure). She has 8 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?

Answer 1

Lets figure out the given by the following steps:
Number of dots in each row = $8$ dots
Number of rows = $r$
Therefore, number of dots = $8r$
When there are $8$ rows,
then number of dots = $8 \times 8$ = $64$ dots
When there are $10$ rows,
then number of dots = $8 \times 10 = 80$ dots
So, the correct answer is: 80 dots.