A worker can load one truck in 6 hours. A second worker can load the same truck in 8 hours. If both workers load one truck simultaneously while maintaining their constant rates, approximately how long, in hours, will it take them to fill one truck?  Choose the correct choice:
A) 2.6
B) 2.8
C) 3.0
D) 3.2
E) 3.4
The workers fill the truck at a rate of 1/6 + 1/8 = 14/48 = 7/24 of the truck per hour.   Then the time to fill one truck is 24/7 which is about 3.4 hours.   The answer is 3.4.
<result>E</result>
A worker can load one truck in 6 hours. A second worker can load the same truck in 8 hours. If both workers load one truck simultaneously while maintaining their constant rates, approximately how long, in hours, will it take them to fill one truck?