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

Answer 1

Number of dots in 1 row = 9

Number of rows = r

Total number of dots in r rows = Number of rows × number of dots in a row

= 9r

Number of dots in 8 rows = 8 × 9 = 72

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