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?
Answers
Answered by
66
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.
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