If Jack can pick a raspberry patch in 6h and Jason can pick

If Jack can pick a raspberry patch in 6h and Jason can pick it in 8h, find how fast they can harvest the patch together.

Given that

Jack can pick a raspberry patch in 6h.

i.e Jack can pick a raspberry patch in 1h = 1/6

Jason can pick a raspberry patch in 8h

i.e Jason can pick a raspberry patch in 1h = 1/8

Jack and Jason harvest the patch together in 1h = (1/6 ) + (1/8)

= 7 / 24

Therefore,

Jack and Jason harvest the patch together = 24 / 7 h = 3.423 h