A farm used two harvesting machines, H and K, to harvest 100 acres of wheat. Harvesting machine H, working alone at its constant rate, harvested 40 acres of wheat in 8 hours. Then harvesting machine K was brought in, and harvesting machines H and K, working together at their respective constant rates, harvested the remaining acres of wheat in 6 hours. Harvesting machine K harvested how many acres of wheat per hour?
Choose the correct option
A) 4
B) 8
C) 12
D) 13
E) 15
Rate of H = 6 acres/hr   Remaining land to be harvested = 100 - 40= 
<gadget id="calculator">100 - 40</gadget>
<output>60</output>
60   Rate of H and K= 60/6= 
<gadget id="calculator">60/6</gadget>
<output>10</output>
10 acres/hr   Rate of K= 10 - 6= 
<gadget id="calculator">10 - 6</gadget>
<output>4</output>
4   4nswer: 4
<result>A</result>
A farm used two harvesting machines, H and K, to harvest 100 acres of wheat. Harvesting machine H, working alone at its constant rate, harvested 40 acres of wheat in 8 hours. Then harvesting machine K was brought in, and harvesting machines H and K, working together at their respective constant rates, harvested the remaining acres of wheat in 6 hours. Harvesting machine K harvested how many acres of wheat per hour?