Question

if Joe can paint a house in 3 hours and Sam can paint the same house in 5 hours, how long does it take for them to do it together?​

Answer 1

Answer:

The first painter can paint a house in 3 hours, so he can paint 1/3 of a house per hour. The second painter can paint a house in 5 hours, so he can paint 1/5 of a house per hour. So: 5/15 + 3/15 = 8/15 of the job per hour.

Answer 2

${\huge{\boxed{\mathcal{\red{¶••ANSWER••¶}}}}}$

if Joe can paint a house in 3 hours and Sam can paint the same house in 5 hours, how long does it take for them to do it together?

$\huge\boxed{\fcolorbox{red}{yellow}{Required Answer...}}$

The first painter can paint a house in 3 hours, so he can paint 1/3 of a house per hour. The second painter can paint a house in 5 hours, so he can paint 1/5 of a house per hour. So: 5/15 + 3/15 = 8/15 of the job per hour.