RRB NTPC Prelims Model Paper 12 with solutions
© examsiri.com
Question : 69 of 100
Marks:
+1,
-0
Two pipes A and B can fill a cistern in 37 1⁄2 minutes and 45 minutes respectively. Both pipesare opened. The cistern will be filled in just half an hour, if pipe B is turned off after:
Go to Question: