Multiple choice general knowledge math & puzzles

Helpers are needed to prepare for the fete. Each helper can make either 2 large cakes or 35 small cakes per hour. The kitchen is available for 3 hours and 20 large cakes and 700 small cakes are needed. How many helpers are required

  1. 10

  2. 15

  3. 20

  4. 30
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A Correct answer
Explanation

Total work needed: 20 large cakes (10 hours of work at 2/hr) and 700 small cakes (20 hours of work at 35/hr). Total work = 30 helper-hours. Since the kitchen is available for 3 hours, the number of helpers needed is 30 / 3 = 10.

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