#
SAT Question of the Day July 24th 2013

### A mechanic can install carburetors in cars every hours. At that rate, how long will it take the mechanic to install carburetors in cars?

### A. hr min

### B. hr min

### C. hr min

### D. hr min

### E. hr min

### This is a work/rate problem. It is further complicated by the use of two types of units – hours in the question and a combination of hours and minutes in the answer.

### I suggest you remember that every 15 minutes is 1/4 or 0.25 of an hour and 20 minute are one third of an hour.

### Now lets get to work…

### Our mechanic installs carburetors in 3 cars every 4 hours. It takes him then (without lunch breaks etc.) one hour and 20 minutes (a third) to install a carburetor in one car. Times five will give us 5 hours + 5X1/3 of an hour or another hour and forty minutes. Altogether 6 hours and forty minutes.

### 66% got it right out of 173,000.

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