Direct proportion and inverse proportion

1. A recipe requires 3 eggs to make 7 cookies. How many eggs will be needed to make 14 cookies?

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CCSS.6.RP.A.3B

A bottling machine makes 60 bottles in 9 hours. How many bottles will it make in 3 hours?

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CCSS.6.RP.A.3B

1. If Jesse walks 600 meters in 15 minutes, how many meters will he walk in 90 minutes?

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CCSS.6.RP.A.3B

If 40 men can reap a field in 15 days, in how many days can 20 men reap the same field?

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CCSS.HSA.CED.A.1

1. A hostel has enough food for 25 students for 16 days. How long will the food last if 75 more students join them?

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CCSS.HSA.CED.A.1

A fort had enough food for 30 soldiers for 60 days. How long would the food last if 60 more soldiers join after 12 days?

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CCSS.7.RP.A.3