Question

Sandra prepared 15 kilograms of dough after working 3 hours. How many hours did Sandra

work if she prepared 20 kilograms of dough? Solve using unit rates.
hours

Answer 1

4 hours

Explanation:

4 hours because if 15 is 3 hours. count by 5. 5 kilograms of dough would be 1 hour, 10 kilograms of dough would be 2 hours leaving 15 at 3 hours and 20 kilograms at 4 hours.