8. When the drain is closed, a swimming pool can be filled in four hours. When the drain is open, it takes five hours to
empty out the pool. The pool is being filled up, but the drain
was accidentally left open. How long will it take to fill up the
pool?

41*67/2=1373.5

step-by-step explanation:

i just used a calculator

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

3

step-by-step explanation: