Solve the problem.
-Frank can type a report in 4 hours. James takes 7 hours to type it. How long will it take the two of them typing together?
A) $\frac { 1 } { 11 }$ hours
B) $2 \frac { 6 } { 11 }$ hours
C) $\frac { 1 } { 28 }$ hours
D) $9 \frac { 1 } { 3 }$ hours

Question

Quizplus · Accepted Answer

Let's say the report is 28 pages long (since it's divisible by both 4 and 7 for our convenience).

Frank can type 7 pages per hour (since 28 ÷ 4 = 7).

James can type 4 pages per hour (since 28 ÷ 7 = 4).

Working together, they can type 11 pages per hour (7 + 4).

Thus, they can finish typing the report in 2 6/11 hours (since 28 ÷ 11 = 2 with a remainder of 6, so the answer is 2 and 6/11 hours). Therefore, the answer is B.

Solve the Problem 111\frac { 1 } { 11 }111​ Hours B)

Solve the Problem $\frac { 1 } { 11 }$ Hours
B)