Question

Question 85 (i)

A triangle is made up of 2 red sticks and 1 blue stick.

The length of a red stick is given by r and that of a blue stick is given by b. Using this information, write an expression for the total length of sticks in the pattern given below

Answer 1

Given, length of a red stick = r and length of a blue stick = b
From the given figure,
The total number of red sticks = 18
and the total number of blue sticks = 6

So, the total length of sticks = 18r + 6b = 6(3r + b)
Hence, the required expression is 6(3r+b).