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Question

A bread making machine can make bread of 50kgdough in3minutes. How many such machines are required to make 300kgbread in 6 minutes?


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Solution

Given that, One machine makes 50kg bread in3 mins

1machine:50kg:3mins

To find the number of machines to make 300kg in 3 mins:

300÷50=6

The number of machines varies directly with the amount of dough

1x6machines:50x6kg:3mins

6machines:300kg:3mins

To find the number of machines needed if the 300 kg dough is done in 6 mins:

6÷3=2

The number of machines is inversely proportional to the time needed.

6÷2machines:300kg:3x2mins

3machines:300kg:6mins
Hence, We will need 3 machines to make bread of 300kg dough in 6minutes.


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