Searched this forum but could not find this question answered before. Can someone help explain the OA.
A cold water tube can fulfill a pool in C hours; a hot water tube can fulfill it in H hours. C<H. Two tubes together can fulfill the pool in T hours. Which of the following must be true?
I. 0<T<H
II. C<T<H
III. C/2 < T < H/2
OA: I + III
A cold water tube can fulfill a pool in C hours; a hot water tube can fulfill it in H hours. C<H. Two tubes together can fulfill the pool in T hours. Which of the following must be true?
I. 0<T<H
II. C<T<H
III. C/2 < T < H/2
OA: I + III
