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A herd of dinosaurs made paintings in the sand with their claws. Each baby dinosaur made 15 paintings and each adult dinosaur made 7 paintings. The entire herd made 208 paintings in total, and there were 3 times as many baby dinosaurs as adult dinosaurs. How many baby dinosaurs and adult dinosaurs were there?

Guest May 16, 2017
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A herd of dinosaurs made paintings in the sand with their claws. Each baby dinosaur made 15 paintings and each adult dinosaur made 7 paintings. The entire herd made 208 paintings in total, and there were 3 times as many baby dinosaurs as adult dinosaurs. How many baby dinosaurs and adult dinosaurs were there?

 

Let the number of adult dinosaurs = D

Then the number of baby dinosaurs =3D

 

7D + 3D(15) = 208

7D +45D = 208

52D = 208    divide both sides by 52

D = 208 / 52

D = 4 Adult dinosaurs,

4 x 3 =12 Baby dinosaurs.

Guest May 16, 2017

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