Question

Challenge 3
A cup contains some coffee.
Adnan drinks 2/5 of the coffee.
There is 120 ml of coffee left.
How much coffee was in the cup at the start?​

Answer 1

Answer:Let:

Original amount of coffee be 5/5x. Then

5/5x-2/5x=120ml

5/5x-2/5x=120ml

3/5x=120ml

3x=120×5

3x=600

X=600÷3

X=200

The coffee at the beginning was 200 ml.