12. 1400 labourers can finish the construction of a school in 80 days. How many more labourers
needed to construct the school in 20 days?
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Answer:
Step-by-step explanation:
We can use the method of proportion. This is the type of inverse variation.
Let no. Of labourers be x.
1400×80=20x.
X=(1400×80)/20
X= 5600
No. Of labourers mode required= 5600-1400
=4200
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