Question

Frank can do 30 math problems in 60 minutes how many problems can he do in two hours

Answer 1

he can do 60 math problems in two hours.

you can get this answer by multiplying 30x2, which will give you 60. this is because 60 minutes is equivalent to one hour, so if he can do 30 problems in an hour, he would be able to do 60 in two.