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Rangaraj Debbarma

· started a discussion

· 1 Months ago

GUD EVENING SIR/MADAM (Question: 186306.0 )

SIR , HOW WE HAVE DERIVED 40/1. PLEASE EXPLAIN IT.

Question:
A cistern is normally filled in 8 hours but takes another 2 hours to fill because of a leak in its bottom. If the cistern is full, the leak will emply it in : 
Options:
A) 16 hours
B) 20 hours
C) 25 hours
D) 40 hours
Solution:
Ans: (d)


Knowledge Expert

· commented

· 1 Months ago

1/8 - 1/x = (1/10)
so, x = 40 hrs
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