Rate

[Guest]

The Shanghai Tower in China has an elevator which travels 118 stories in 55 sec. Determine rate (mph).

My attempt:

A story is 10 ft.

55 sec. = 0.01527 hrs.

1180 ft = 0.0234 mi.

Rate = Distance / Time.

0.2234 / 0.01527 = 14.62 = 15 mph.

Rate is more. Where did I miscalculate ?

[Guest]

Your calculations seems to be correct. I do not find any mistake.

[Guest]

Ok, Thanks.

Note: Answer given is approx. 3 times more. Don't know how it was obtained.