The Grass is Always Greener in Old Math Texts
The uniformly growing grass on a certain meadow would be consumed by 150 oxen in 15 days and by 120 oxen in 20 days. How many oxen are put in, if 30 are removed after 8 days and the whole of the grass is consumed in 4 days more?
Solution:
Source: Charles Pendlebury's Arithmetic (London: G. Bell & Son, 1918)
