A) 11
B) 12
C) 13
D) 14
Correct Answer: A
Solution :
(A + B)?s 5 day?s work\[=5\left[ \frac{1}{25}+\frac{1}{20} \right]\] \[=\left[ 5\times \frac{9}{100} \right]=\frac{9}{20}\] Remaining work as \[=\left[ 1-\frac{9}{20} \right]=\frac{11}{20}\] 1/20 work is done by B in 1 day. 11/20 work is done by B in \[1\times 20\times \frac{11}{20}\]days= 11 daysYou need to login to perform this action.
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