Read the two statements and choose the correct option.

I. Two filling pipes together always take less time than the faster one alone.

II. Two filling pipes together take the average of their separate times.

Explanation

1. 01

   I: the slower pipe still adds some water each hour, so the tank fills sooner than with the faster pipe alone. True.

2. 02

   II: the rates add, not the times; the average lies between the two times, so it cannot be right. False.