A) \[8\frac{8}{5}\]hours
B) \[8\frac{8}{9}\] hours
C) \[8\frac{17}{9}\]hours
D) \[8\frac{7}{9}\]hours
Correct Answer: B
Solution :
(b): This again is on the pattern of Q.2; \[\Rightarrow \frac{1}{\frac{1}{16}+\frac{1}{20}}=\frac{16*20}{16+20}\]. \[=\frac{320}{36}=\frac{80}{9}=8\frac{8}{9}\] hours.You need to login to perform this action.
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