Question

4. If 30 locusts eat 420 grams of grass in a week. How many days will it

take 21 locusts to consume 420 grams of grass if they eat at the same
rate
​

Answer 1

The amount one locust eats in a week is 420/30 = 14 grams so it eats 14/7 = 2 grams per day, therefore 21 locusts can eat 21 * 14 = 42 grams per day. 420 / 42 = 10 so the answer is 10 days or 1 week and 3 days.