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The ratio of the length of road AB to the length of road BC to the length of road CD is 5:9:10. If BC is 2 km longer than AB,

(a) How long is each road?

AB:

BC:

CD:

(b) If Tom’s walking speed is 2.5 km/h, how much time does Tom need to walk from point C to point D?

hours

Correct!