Q. 3 C

Given: number of villagers (x) = 50

Number of days to dig a pond (y) = 18

Let New number of villagers (x1) = (x1)

New Number of days to dig = 15

As per given condition if the number of days reduced then number of villagers will increases than the previously given. Hence, it is the question of indirect proportion.

i.e. xy = x1y1

or 50 ×18 = 15 × x1

x1 = 60 days

Hence, 15 villagers will need 60 days.

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