Question

Pipe 'A' can fill a tank in 24 hours, while Pipe 'B' takes 36 hours to fill the same tank. If Pipe 'B' is opened first and Pipe 'A' is turned on after a delay of ___ hours, ______ hours will it take to completely fill the tank from the time Pipe 'A' starts flowing? The values given in which of the following options will fill the blanks in the same order in which is it given to make the statement true?
I. 8, 11.2
II. 11, 10
III. 15, 8.4

A Only I
B Only I and II
C Only I and III
D All I, II and III
E Only II and III
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