How old was the dog when he was 6 months old?

Question

A dog weighs 22 kilograms when he was 12 months old. From when the dog was 6 months, he gained 120%. How old was the dog when he was 6 months old?

Answer 1

Hello Ishrat.

 

Is the question "How old was the dog when he was 6 months old", or "How much did the dog weigh when he was 6 months old".

 

The answer to the first question is "6 months"

 

The answer to the 2nd question is:

 

Let x be the dog's weight at 6 months old.

 

x + (x*1.2) = 22 kilograms

 

(x*1) + (x*1.2) = 22

 

x* 2.2 = 22

 

x = 22/2.2

 

x = 10 kilograms

 

the best to you.