Rate-Time-Distance Question

[T]

Question deleted, as it was #108 from the 10th edition OG. Please refer to OG question policy below.

[RA]

Time to walk down X floors = time to walk down each floor * number of floors = 30X seconds

Time to ride down X floors = time to ride down each floor * number of floors = 2X Seconds

To have the same unit of time, convert 7 minutes into seconds. &7minutes = 7 * 60 seconds = 420 seconds

30X = 2X + 420
X = 15.

Please confirm the answer.

[esledge]

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