Amelia is running around a circular 6 km loop. Her friend Boris is injured, so is not going to run the full distance. At the same time and place that Amelia starts, Boris sets out in the opposite direction around the loop, walking at half her running speed. When they meet, Boris turns around and returns to the beginning with Amelia, running at her pace. How far did Boris run?
A 1.5 km B 2.0 km C 3.0 km D 4.0 km

Pls super important solve the botton one

How many grams are in 8 kilograms? if 100 grams = 1 kilogram

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?