Question

Jasen packs 10 boxes of computer parts in 2.5 hours and Ben packs 12 boxes in 3 hours. how long will Jasen and Ben take to pack 100 boxes of computer parts together?

The Answer for this is - 12.5 hours

I need the proper working

Answer 1

Explanation:

Answer 2

let x be the amount of time needed for packing one box.
2.5x = 10
x = 10/2.5
x = 4 minutes per box

3x = 12
x = 12/3
x = 4 minutes per box

Then, either Jasen and Ben need 4 minutes to pack a box.

Each box needs 4 minutes of packing, so 100 boxes divided by 4 is 25. But since for one person it needs 25 then for two people it’s half the time needed so it is 25/2 which is 12.5