SOLUTION: 50 labour can dig a pond in 16 days . How many laboures will be required to dig another pond, double in size in 20 days.

Question 950680: 50 labour can dig a pond in 16 days . How many laboures will be required to dig another pond, double in size in 20 days.
Found 2 solutions by ankor@dixie-net.com, macston:
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
50 labour can dig a pond in 16 days .
Find how many man-days to dig the pond
50 * 16 = 800 man-days
:
How many laboures will be required to dig another pond, double in size in 20 days.
Assume a pond double in size requires 1600 man-days
let m - number of men required to do this 20 days
20m = 1600
m = 1600/20
m = 80 men required

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
1 pond/16 days=1/16 pond/day Fifty laborers dig 1/16th pond per day.
(1/16 pond/day)/50 laborers=1/800 pond per day per laborer Each laborer digs 1/800 pond per day.
To dig a pond double that, basically 2 ponds in 20 days is 2 ponds/20 days=1/10 pond/day.
(1/10 pond/day)/(1/800 pond/day/laborer)=80 laborers
ANSWER It would require 80 laborers to dig a pond twice the size in 20 days
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