Photo de stock - Detroit, Michigan - Students from Mater Dei High School in Evansville, Indiana prepare to compete in ultra high mileage cars they have designed for the Shell Eco-Marathon. The contest challenges students to build fuel-efficient vehicles; the winning entry in the gasoline prototype class posted 3,421 miles per gallon. Before the team could compete, the car´s brakes were tested on an inclined ramp. Mater Dei placed third in the competition.

Photo de stock: Detroit, Michigan - Students from Mater Dei High School in Evansville, Indiana prepare to compete in ultra high mileage cars they have designed for the Shell.

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