Question

There are 3 times as many ducks as cows on a farm.There are 400 legs altogether.How many ducks and cows are there altogether?

Answer 1

There is a ratio of 4 cows to 6 ducks.
There are 160 cows and 240 ducks.

Answer 2

x 2 + 1u x 4 = 10u ——- 400
1u ——- 400/10 = 40 (cows)
3u ——- 40 x 3 = 120 (ducks)

Answer 120 ducks and 40 cows, totalling 160.