Bao Xiao's answer in one minute is 1/50, and Beckham's answer in one minute is 1/30.

Bao Xiao answered after 30 minutes.

30× 1/50=3/5, leaving 2/5 Beckham to do it.

So how long did Beckham spend?

2/51/30 =12 minutes

They spent 30+ 12=42 minutes in total. Can't finish typing within the specified time.