Question

Первая машинистка печатает за 1 час 2\9 рукописи , а вторая 1\18 рукописи.Какую часть рукописи напечатают обе машинистки за 2 часа?

Answer 1

( 2/9 ) + ( 1/18 ) = ( 4/18 ) + ( 1/18 ) = 5/18 (  книги ) напечатают обе машинистки за один час работы 
2 * ( 5/18 ) = 10/18 = 5/9 (  книги ) - Ответ 

Answer 2

Calculation of the Fraction of Manuscripts Printed by Both Operators

To calculate the fraction of manuscripts printed by both operators in 2 hours, we need to determine the individual rates at which each operator prints manuscripts.

Let's denote the number of manuscripts printed by the first operator in 1 hour as x, and the number of manuscripts printed by the second operator in 1 hour as y.

According to the given information, the first operator prints 2/9 of a manuscript in 1 hour, and the second operator prints 1/18 of a manuscript in 1 hour.

Therefore, we can set up the following equations:

x = 2/9 (number of manuscripts printed by the first operator in 1 hour) y = 1/18 (number of manuscripts printed by the second operator in 1 hour)

To find the fraction of manuscripts printed by both operators in 2 hours, we need to calculate the total number of manuscripts printed by each operator in 2 hours and then find the common fraction.

The total number of manuscripts printed by the first operator in 2 hours is 2x, and the total number of manuscripts printed by the second operator in 2 hours is 2y.

The fraction of manuscripts printed by both operators in 2 hours is given by:

(2x + 2y) / (2x + 2y)

Simplifying the expression, we get:

1

Therefore, both operators will print the entire manuscript in 2 hours.

Please note that the search results provided did not contain specific information related to this question. However, the calculation is based on the given information and does not require external sources.