Tao Nan School P6 Math CA1 2004 (Q47)

A farmer had 400 animals. 20% of them were cows and the rest were goats. He bought some more cows and goats. The number of goats increased by 20% and the number of cows increased by 40%. How many animals did he buy altogether?

Solution

Before more cows and goats were bought

Cows ----- 20% x 400 (animals) = 80

Goats ----- 80% x 400 (animals) = 320


After more cows and goats were bought

Cows ----- 80 x 40% = 32

Goats ----- 320 x 20% = 64

Total animals bought 32 + 64 = 96

Answer: He bought 96 animals altogether.