Lydia has 5 dogs. 2 of the dogs eat 2kg (combined) of food per week. 2 other dogs eat 1kg (combined) per week. The fifth dog eats 1kg of food every three weeks. How much food will the dogs have eaten altogether in 9 weeks?

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Answer 1 · 2018-03-11T08:10:15

Here is the answer below.

Let's start with the first two dogs. They eat #2# kg of food per week, so for #9# weeks #= "2 kg" xx 9 = "18 kg"#.

The other two dogs eat #1# kg food per week, so for #9# weeks #= "1 kg" xx 9 = "9 kg"#.

The fifth dog eats #1# kg every 3 weeks, so after #9# weeks #= "1 kg" + "1 kg" + "1 kg" = "3 kg"#.

So the total food consumed #=# the sum of all of them.

So the total food consumed #= "18 kg" + "9 kg" + "3 kg" = "30 kg"#