Asked by Muneer
It takes Frank 2 hours longer than Jane to carpet a certain type of room. Together they can carpet that type of room in 1(7/8) hours. How long would it take for Frank to do the job alone?
Answers
Answered by
R_scott
they each do a fraction , together the fractions add to one (the whole)
(15/8) / F + (15/8) / J = 1
(15/8) (J + F) = J * F
substituting ... (15/8) (2 F - 2) = F^2 - 2 F
0 = F^2 - 23/4 F + 15/4
0 = 4 F^2 - 23 F + 15
(15/8) / F + (15/8) / J = 1
(15/8) (J + F) = J * F
substituting ... (15/8) (2 F - 2) = F^2 - 2 F
0 = F^2 - 23/4 F + 15/4
0 = 4 F^2 - 23 F + 15
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