Pipes A and B can fill a cistern in 8 and 24 minutes respectively. They are opened an alternate minutes. Find how many minutes, the cistern shall be full?
Choose the correct choice from the following options
A) 12 min	B) 6 min	C) 4 min	D) 8 min	E) 10 min
1/8 + 1/24 = 1/6   6 * 2= 
<gadget id="calculator">6 * 2</gadget>
<output>12</output>
12   12 minNSWER 12 min
<result>A</result>
Pipes A and B can fill a cistern in 8 and 24 minutes respectively. They are opened an alternate minutes. Find how many minutes, the cistern shall be full?