Question 193333
VERY  Good  Job!!!!!!!!
All  answers  are  correct  and  you  already  know  this  because  you  checked  them ,,,extra  goodness.

In  problem  2)  you  stated  the  answer  without  the  calculations.  Perhaps  just a  typo.
if  not  you  might  include  something  like  
60/v1=60/2v2=(60/v2)-2
60=120-4v2
v2=15,    and  therefore  v1=30

Again,,,,please  keep  up  the  good  work