Problema Solution
If 330 people have to construct 30 km of railway in 9 months, how many months will it take for 275 people, working at the same rate, to construct 150 km of track?
Answer provided by our tutors
The rate of 330 people is: 30/9 km/month
The rate per person then is: (1/330)*(30/9) km/month
Let 'x' represent the tame in moths, that 275 people will need to construct 150 km of track.
(1/275)(150/x) = (1/330)*(30/9)
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click here to see the equation solved for x
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x = 54 months
275 people will need 54 months to construct 150 km of track.