A whale goes on a feeding frenzy that lasts for 5 hours. For the first hour he catches and eats x kilos of plankton. In every hour after the first, it consumes 3 kilos of plankton more than it consumed in the previous hour. If by the end of the frenzy the whale will have consumed a whopping accumulated total 450 kilos of plankton, how many kilos did he consume on the third hour? Choose the correct choice from the following choices:
A) 38
B) 47
C) 50
D) 53
E) 93
If you list the amount eaten each hour, you'll get an equally spaced list, increasing by 3 each hour. In any equally spaced list, the median equals the mean. Here, the mean is  450/5= 
<gadget id="calculator"> 450/5</gadget>
<output>90</output>
90, so the median is also 90, and that is the amount eaten in the 2nd hour. We need to add 3 to find the total eaten in the next hour, so the answer is 93   option 93
<result>E</result>
A whale goes on a feeding frenzy that lasts for 5 hours. For the first hour he catches and eats x kilos of plankton. In every hour after the first, it consumes 3 kilos of plankton more than it consumed in the previous hour. If by the end of the frenzy the whale will have consumed a whopping accumulated total 450 kilos of plankton, how many kilos did he consume on the third hour?