Sixty men can stitch 200 shirts in 30 days working 8 hours a day. In how many days can 45 men stitch 300 shirts working 6 hours a day?	Choose the correct choice from the following options.
A) 20	B) 90	C) 10	D) 80	E) 70
80   80   We have M1 801 H1 / W1 = M2 802 H2 / W2 (Variation rule)   (60 * 30 * 8)/ 200 = (45 * 802 * 6) / 300   802 = (60 * 30 * 8 * 300) / (200 * 45 * 6) =&gt; 802 = 80.
<result>D</result>
Sixty men can stitch 200 shirts in 30 days working 8 hours a day. In how many days can 45 men stitch 300 shirts working 6 hours a day?