Question

ПОМОГИТЕ Рукопись в 60 страниц машинистка может перепечатать за 10 часов а ученица за 15 часов за сколько часов они перепечатают рукопись вместе??????????????????? ПОМОГИТЕ ПЛИИИИИИЗ ОЧЕНЬ НАДА КОМУ НЕ В ЛОМ ЭТО 3 КЛ

Answer 1

1) 60 / 10= 6(стр/ч) - напечатала машинистка за 1 час.
2) 60 / 15=4(стр/ч) - напечатала ученица за 1 час.
3) 6+4=10(стр/ч) - общая скорость .
4) 60 / 10= 6( ч) - они перепечатают рукопись работая вместе.

Answer 2

Машинистка 60/10=6 страниц в час
Ученица 60/15=4 страницы в час
Вместе в час печатают 4+6=10 страниц
Рукопись вместе полностью 60/10=6 часов

Answer 3

To find the answer to your question, let's calculate the combined rate at which the machinist and the student can transcribe the manuscript.

The machinist can transcribe the manuscript in 10 hours, which means she can transcribe 1/10 of the manuscript in 1 hour.

Similarly, the student can transcribe the manuscript in 15 hours, which means she can transcribe 1/15 of the manuscript in 1 hour.

To find the combined rate, we add the rates of the machinist and the student:

1/10 + 1/15 = 3/30 + 2/30 = 5/30

Therefore, together they can transcribe 5/30 of the manuscript in 1 hour.

To find the total time it will take for them to transcribe the entire manuscript, we divide the total manuscript length (60 pages) by their combined rate (5/30):

60 / (5/30) = 60 * (30/5) = 360 hours

So, it will take them 360 hours to transcribe the manuscript together.

Please note that this calculation assumes that both the machinist and the student work at a constant rate without any breaks or interruptions.