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A gardener is digging a plot of land. As...

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 `(2)/(sqrt(t))` square metres per minute. How long will it take him to dig an area of 40 square metres ?

A

10 minutes

B

40 minutes

C

100 minutes

D

30 minutes

Text Solution

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The correct Answer is:
C
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