A scientist invented a Lamp that can give light

A scientist invented a Lamp that can give light for about 130 hours, rounded to the nearest 10 hours, and used 10 gallons of oil, rounded to the nearest gallon. The actual number of hours per gallon that the lamp lighted must have been between

A. \(\frac{125}{10.5}\) and \(\frac{135}{9.5}\)

B. \(\frac{135}{10}\) and \(\frac{125}{9.5}\)

C. \(\frac{125}{9.5}\) and \(\frac{135}{10.5}\)

D. \(\frac{130}{10.5}\) and \(\frac{130}{9.5}\)

E. \(\frac{135}{10.5}\) and \(\frac{125}{9.5}\)

I don't understand why the correct answer should be: \(\frac{125}{10.4}\) and \(\frac{134}{9.5}\).

If the actual number of hours is 10.5, it should be rounded to 11. And if the actual number of galons is 135, it should be rounded to 140.

Please, your comments.

Source: grockit.com