To get the maximum amount of hours you can park with 20 tokens, we can multiply.
4 x 7 = 28
28 is the closest number to 30. With 30 tokens, you can use 28 and park in the garage for 7 hours.
If you wanted to use all 30 tokens, you can take the remaining 2 and get an extra 30 minutes. Since 2 is half of 4 and 30 minutes is half of an hour, it splits up evenly.
Read the question carefully: it costs 4 tokens to park in a garage for an hour.
We will apply the unitary method to solve this question
It costs 4 tokens to park in a garage for 1 hour
Find how many hours can park in a garage for 1 token
If it costs 4 token to park in a garage for 1 hour
Then it will cost 1 token to park in a garage for 1/4 hour
Step2:
With 20 token we can park in a garage for (1/4) * 20
= 5 hours
So, we can park for 5 hours with 20 tokens.
Another method
If we take twenty tokens and divide them into groups of four, we will find that we are left with five groups of tokens. Each group of tokens represents an hour of parking time. This will give us five groups, or five hours, total.
