Question

Radha has a blue ribbon and a red ribbon. 6 more than three times the length of the blue ribbon is equal to the length of the red ribbon. If the length of the red ribbon is 21 cm, what is the length of the blue ribbon? The length of the blue ribbon is cm.

Answer 1

Answer:

Length of Blue ribbon = 5cm

Step-by-step explanation:

Now,

Let the length of Blue ribbon be B and length of Red ribbon be R.

Then,

According to the Question,

Length of Red ribbon is 6 more than 3 times the length of Blue ribbon,

Red = 3(Blue) + 6

Then, we get

R = 3B + 6 ------ 1

But now we are given that,

Length of Red ribbon (R) = 21 cm

So, from eq.1 we get,

21 = 3B + 6

Solving for B,

3B + 6 = 21

3B = 21 - 6

3B = 15

B = 15/3

B = 5cm

Hence,

Length of Blue ribbon = 5cm