How to distribute 100 strawberries between these groups based on speed?

There are 100 strawberries to be eaten as quickly as possible by 40 people.
Amongst them are..

10 - Adults
20 - Youths
10 - Kids

Time one take to eat 1 strawberry as follows..
Adults - 2 minutes
Youths - 3 minutes
Kids - 4 minutes

How to distribute the 100 strawberries between this group efficiently