The whaling ship pequod is resting peacefully at anchor.?

Question

The whaling ship pequod is resting peacefully at anchor. Over its side hangs a ladder with rugs 1 foot apart. if eight rugs are above the water line at low tide and the tide rises at eight inches per hour, how many rugs will still be above the waterline in 4 hours?

Answer 1

Eight rugs(isn't it spelled rungs?).