An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 7/10 of its capacity. How much more time L will it take to fill the bucket to full capacity?
Choose the correct choice from the following options.
A) 7/18	B) 9/18	C) 2	D) 18/7	E) 18/5
Solution -   Work and Time are directly proportional. W1/W2=T1/T2   7/10 work in 6 mins   1 work in T mins   (7/10)/1 = 6/T -&gt; T = 60/7 mins.   Remaining minutes to fill the tank L = 60/7 - 6 = 18/7 mins. ANS 18/7.
<result>D</result>
An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 7/10 of its capacity. How much more time L will it take to fill the bucket to full capacity?