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## Question

primary 5 | Maths
| Whole Numbers

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Pls help. Thank you

Since there are 3 times as many ducks as cows, we group each cow with 3 ducks.

In one group, there are 3 ducks so they have a total of 3 x 2 legs = 6 legs. The 1 cow has 4 legs.

So total number of legs in one group is 4 + 6 = 10

Since there are 400 legs in total,

400 ÷ 10 = 40

There are 40 groups.

Since there are 4 animals per group (1 cow and 3 ducks),

Total number of animals

= 40 x 4

= 160

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