Multiple choice

A bowl is half full of water. Four cups of water are then added to the bowl, filling the bowl to 70% of its capacity. How many cups of water are now in the bowl?

  1. 12

  2. 20

  3. 15

  4. 14
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let C be the capacity of the bowl. Initially, 0.5C is present. Adding 4 cups makes it 0.7C. Thus, 0.2C = 4, meaning C = 20. The final amount is 70% of 20, which is 14.

AI explanation

Adding 4 cups increases the capacity from 50 percent to 70 percent, meaning 4 cups represents 20 percent of the bowl's total capacity. Letting C be the total capacity in cups, 0.20 times C equals 4, so C equals 20. The bowl currently holds 70 percent of this capacity, which is 0.70 times 20, so there are 14 cups of water in the bowl.

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