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 15 hours a day?	Options:
A) 23	B) 22	C) 21	D) 20	E) 19.2
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*15= 
<gadget id="calculator">20*15</gadget>
<output>300</output>
300   Therefore number of days=5760/300= 
<gadget id="calculator">5760/300</gadget>
<output>96/5 = around 19.2</output>
19.2 days   Ans=19.2
<result>E</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 15 hours a day?