the food in a camp lasts for 20 men for 50 days . if 20 more men join , how many days will the food last ?
one man can consume the same food in 20 * 50 = 1000 days . 20 more men join , the total number of men = 40 the number of days the food will last = 1000 / 40 = 25 days . answer : b
divide(multiply(20, 50), add(20, 20))