If 20 workers pack 700 kg of rice in 6 days, then 300 kg of rice can be packed by 10 workers in how many days?
(2 marks)

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Solution

Here less workers, required more days, so it is indirect proportion. The multiplying factor is 50/25.

Less work done required less days to pack the rice, so it is in direct proportion. The multiplying factor is 300/700.
(1 mark)

x=6×(20/10)×(300/700)=36/7

Therefore, 36/7 days have been required. (1 mark)

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