Koby can work about 22 math problems in 30 min. at this rate, how many math problems can koby work in 3 hours

3 hours = 180 minutes.
180 / 30 = 6

22 * 6 = 132

Koby can work about 132 maths problems in 3 hours.

So we know that there is 60 minutes in a hour, right? 60/30=2 so in a hour he can do 22 math problems twice. So we multiply 22*2=44 now we know in every hour Koby can do 44 problems. The question asks in 3 hours how many can he do. So now we multiply 44*3=132 
Your answer will be 132 math problems in 3 hours