AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

Radha is drawing a dot rangoli (a beautiful pattern of lines joining dots) with chalk powder, She has dots in a row. How many dots will her Rangoli have for r rows? How many dots are there if there are dots in a row. How many dots will her Rangoli have for r rows? How many dots are there if there are rows? If there are rows? If there are rows?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

92, 72, 90

,72, 90

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Concept- By dividing the number of dots by the number of rows in a pattern or design rangoli, you can get the number of dots in each pattern..
Given

(when multiply with r)
Substituting the values

Therefore, the number of dots in 8 rows is 72 dots.(8x is number of dots in row)
For 10 row.
=

As a result, there are 9 dots in a row, 72 dots in an eight-row column, and 90 dots in a ten-row column.
Hence, the correct answer is option number 1).

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!