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Question

There were some cows,sheep and horses in a farm. 30% of the animals were cows. There were 124 sheep and 12 fewer horses than cows. The farmer bought more cows and as a result,the total number of animals was increased by 15%.
a) How many more cows than sheep were there in the end?
b) Find the percentage increase in cows.
How to do?
Tks

Answer

(a)

If there were 3u cows in the beginning, there were in total 10u animals and (3u – 12) horses.

10u = 3u + 124 + 3u – 12

4u = 112

u = 28

3u = 84

10u = 280

280 * 15%  = 280 * 15/100 = 42

84 + 42 = 126

126 – 124 =2

There were 2 more cows than sheeps in the end. 

(b) 42/84 * 100% = 50%

There was a increase of 50% of cows in the farm. 

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