Two trucks travel from Alphaburg to Betaville along the same route.

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Truck A travels at 50 mph and Truck B travels at 60 mph. Truck A starts one hour before Truck B. How many hours after Truck B starts will the two trucks meet?

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Truck A travels at 40 mph and Truck B travels at 60 mph. Truck A starts two hours before Truck B. How many hours after Truck B starts will the two trucks meet?

Truck A travels at 55 mph and Truck B travels at 65 mph. Truck A starts 1.5 hours before Truck B. How many hours after Truck B starts will the two trucks meet?

Truck A travels at 45 mph and Truck B travels at 55 mph. Truck A starts 0.5 hours before Truck B. How many hours after Truck B starts will the two trucks meet?

Truck A travels at 50 mph and Truck B travels at 70 mph. Truck A starts 1.2 hours before Truck B. How many hours after Truck B starts will the two trucks meet?

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Official Explanation

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Truck A has a head start of 1 hour at 50 mph, covering 50 miles before Truck B starts.

Relative speed when moving in the same direction =

60 - 50 = 10

mph.…

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What this question tests

What it tests

Your ability to spot and extend arithmetic and geometric sequences and work with recursive definitions.

Common trap

Off-by-one errors in indexing (a₀ vs a₁) or confusing an arithmetic difference with a geometric ratio.