To asphalt 1km road, 30 men spent 12 days working 8 hours per day. How many days, 20 men will spend to asphalt a road of 2km working 14 hours a day? Choose the correct choice from the following choices
A) 24 B) 23 C) 24 D) 20.57 E) 22
Man-hours required to asphalt 1 km road=30*12*8= 
<gadget id="calculator">30*12*8</gadget>
<output>2_880</output>
2880   Man-hours required to asphalt 2 km road=2880*2= 
<gadget id="calculator">2880*2</gadget>
<output>5_760</output>
5760   Man-hours available per day=20*14= 
<gadget id="calculator">20*14</gadget>
<output>280</output>
280   Therefore number of days=5760/280=20.57 days   Ans=20.57
<result>D</result>
To asphalt 1km road, 30 men spent 12 days working 8 hours per day. How many days, 20 men will spend to asphalt a road of 2km working 14 hours a day?