A ship sails with a supply of rations for 60 days at a daily allowance of 2.1 pounds of food per head. After sailing for 20 days, the ship encounters a storm in which five members of the crew are washed overboard .

The damages sustained by the ship add a 24 days delay to the trip; thus, each crew member’s allowance must be reduced to 1.5 pounds of food per head.

Find the original number of members of the crew.