Answer:
10 minutes =(1/6)th of an hour
cost of running it for an hour = 0.09*7=0.56 c
in 10 min the cost should be (1/6)*0.56c=0.08c
Explanation:
Your scanner power is 15W so, it will consume 15*60=90Wh of electricity in an hour. that is 0.09KWh.
So, cost of running it for an hour = 0.09*7=0.56 c
Which means that in 10 min the cost should be (1/6)*0.56c=0.08c
