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Previous Year Question (PYQs)



If 2 cats catch 2 mice in 2 minutes, how many cats are needed to catch 18 mice in 18 minutes?





Solution

By the formula 
M1H1D1W1=M2H2D2W2 ----(i)

Here 
M1=2,H1=2,W1=2
M2=?,H2=18,W2=18 

Using (i)
2×2×12=M2×1818
M2=2
Hence, 2 cats are needed to catch 18 mice.


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