AP ICET 2015 Paper

Question : 93 of 200

Marks: +1, -0

A can turnout twice the amount of work that B can do. If B alone can complete that work in 12 days, then in how many days can A and B complete that work together ?

Validate

Solution:

Given ;

T_B=12

days
Ratio of efficiency,

E_A:E_B=2:1

\text "Time taken"∝1/\text "Efficiency"

T_A=12/2=6

days
Time taken when A & B work together

={T_{A}⋅T_{B}}/{T_{A}+T_{B}}={6×12}/{6+12}=4

days

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