In previous problem, the car's fuel economy in miles per gallon or `km//L` appear to be.

Options

A. 1.50 times better
B. 2.25 times better
C. 1.50 times worse
D. 2.25 times worse

Answer

C

Explanation

( c) I fthe driver uses the odometer reading is a factor of `1.5` too small because the odometer assumes `1 rev = 2 pi R` for a standard tire radius `R`, whereas the actual distance travelled is `1.5(2 pi R)`, so the fuel economy in miles per gallon wil appear to be lower by a factor of `1.5`. Example : If the car travels `15 km`, the odometer will read `10 km`. If the car actually makes `15 km//gal`, the calculation will give `10 km//gal`.