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# Planes and Trains Edgeworth

MICRO-RXEZE9

Future mechanical engineers Martin and John have toy planes and train sets to help them with their vehicle designs. Martin, being afraid of heights, has 2 planes and 7 trains.

John has 6 planes, but having seen too many old cowboy movies where people get tied to railroad tracks, only has 3 trains.

If trains are plotted on the $x$-axis and planes are plotted on the $y$-axis, what are the dimensions of this Edgeworth box?

A

$9 \times 9$

B

$5 \times 13$

C

$13 \times 5$

D

$10 \times 8$

E

$8 \times 10$