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1. If 6 boys can decorate a hall for a program in 3 hours, how long will it take 9 boys to

decorate it?

A. 2 hours B. 3 hours C. 4 hours D. 5 hours

2. Twelve painters can paint a building in 10 days. How many painters are needed to paint it in 6 days?

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3. If 4 farmers can plow a 3-hectare land in 6 days, how long will 8 farmers do it?

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4. A stock of food is enough to feed 50 persons for 14 days. How many days will the food last if 20 more

persons will be added?

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