(asap? )
the sisyphus monastery is on a hill, and every day donkeys climb the hill
carrying water from the well in the valley. there are many donkeys, and they leave the well (at the bottom of the hill) every 15 minutes. they take one hour to climb the hill, 10 minutes to unload their water, and then half an hour to return to the well.
when a donkey goes uphill carrying water, in the middle of the day, how many does it pass coming down?
a container ship is overtaking an oil tanker on the way out of harwich
harbor, and the first mate notices that if he starts walking from the front of the container ship when the two ships start overlapping, he reaches the back as the two ship separate. he walks at 3 km/hour.
if the container ship is 100 m long, and travelling at 12 km/hour, how long is the oil tanker?