Question

President Obama has set up a slide for his young children so they( and he) can slide into the pool behind the White House. The White House staff puts the bottom of the slide ( Which is flat for 2m) at the rim of the window sill which is 10m above the ground. Given that the pool is 15m from the base of the White house, how tall must the entrances to the slide be?

Answer 1

That would seem to depend upon the height of the tallest person using the slide.

Do you really mean "how tall"? Or do you mean "How high above pool level?"

Answer 2

how high above pool level