You might see following three types of rate problems on the SAT Math test.

- Cost per unit problems
- Speed problems
- Work-output problems

Each specific type has specific way to solve it. You can identify type of Rate question as follows:

If you see word “cost” in SAT Math question and cost is **to be** **determined**, it is question involving rate type (i).

If you see words “speed” or “kilometers per hour (kph)” or “miles per hour (mph)” and speed or time or distance is **to be calculated** then it is question involving rate type (ii). Use following formula for these questions.

(Speed) (Time) = Distance

If you see words “work” or you see that time for completion of a specific job has been asked for then it is question of type (iii). You can use following formula for such questions.

(rate of work) (time worked) = part of job completed