Shawn started his car(automatic shift),drove 8km and spent 2 minutes at a stop light.Rachel(driving a manual shift) started her car and drove 9km with no stops.Who used more gas?

Question

table of gas usage

automatic manual

idiling:.16L/min .16L/min

starting:0.05L 0.05L

moving:1L/22km 1L/20km

Answer 1

In 8 km, Shawn used 0.364 L (22/8)
He stopped at a light and used 0.32 L (.16 * 2).
His total liters was 0.684 L

In 9 km, Rachel used 0.45 L (9/20)

Answer 2

Shawn