RE: 40 cows graze a pasture in 40 days, 30 cows graze ...
3.g - grass at the beginning r - rate at which grass grows per day y - rate at which one cow eats grass per day n - no of cows to eat the grass in 96 days g + 40*r 40 * 40 * y------- 1 g + 60*r 30 * 60 * y------- 2 g + n*r 20 * n * y-------- 3 from 1 and 2 r 10y g 120r from 3 nr 120r Solving n 120
RE: 40 cows graze a pasture in 40 days, 30 cows graze the same pasture in 60 days. How many days does 20 cows take to graze it?
Inverse relationship exists between cows and graze take a relation like y (m/x)+c; where y cows x graze solve for m c then substitute given cows in y and find out x which comes to be 120
