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K.D.

· started a discussion

· 1 Months ago

ANS: 167 Min. (Question: 394526.0 )

3 min...... 1 litre
165 min.....55 litre
166min .....58litre
167min......60 litre

so 167 min is the right answer. (There is -ve work in this que.)

Question:

A, B and C are three pipes attached to a cistern. A and B can fill it in 20 min and 30 min respectively, while C can empty it in 15 min. If A, B and C be kept open successively for 1 min each, how soon will the cistern be filled?

Options:
A)

172 min

B)

60 min

C)

157 min

D)

155 min

Solution:

Ans: (a)

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