Q. A gardener is digging a plot of land. As he gets tired, he works more slowly. After t minutes he is digging at a rate of 2tsquare metres per minute. How long will it take him to dig an area of 40 square metres ?
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1min=60secs
rate of digging =2m^2/min
therefore
area of land is directly Propotional to time.Which means more the area more will be the time taken to complete the digging
therefore
2*40=80
the gardener will take 80 mins to complete to dig an area of 40 sq metre land
hope this helps
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