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Q: A frog falls into a well 20ft deep To get out he hops up 3 ft but slides back 2 ft How many hops does it take to get out of the well?
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If a snail is at the bottom of a well 30 feet deep and it climbs 3 feet each day but falls back 2 feet each night how long does it take to get to top?

30 days


How many square feet in a room 20ft by 15ft by 10 ft deep?

Not sure which dimension is which. Normally, the square footage of a room is calculated from its length and width, and not height. However, this question gives depth! Is it a dungeon? Anyway, assuming that the depth is the height, the square footage is 20*15 = 300 sq ft


How many square feet are in a building that is 30ft x 20ft x 50ft?

If you are truly looking for SQUARE FEET for a building with these measurements, more informaiton will be needed. A building, whether square or rectangular, will have only two different measurements. My guess is that you are looking for cubic feet, which would include the height of the building. For Example: 30ft x 20ft x 50ft would be 30 ft wide, 20 foot deep (long), and 50 ft tall. Regardless of the placement and the symbolism of the measurements, the result is the same: 30 x 20 x 50 = 30,000 cubic ft.


Why will a vacuum pump not operate for a well that is more than 10.3m deep?

Because the Earth's atmospheric pressure forces the water back down.


Bruce has a pet worm that fell into a well The well is 37 feet deep Each day the worm climbs up 7 feet but each night it slides back down 2 feet How many days will it take for Bruce's worm to ge?

7 days. each 24 hrs he achieves 7-2=5ft, so in 6 days he has climbed 30ft on the 7th day he climbs the last 7ft and is out and doesn't therefore slide back 2ft