Question

Швея может выполнить заказ за 4 часа, а её ученица за 8 часов. За какое время они выполнят этот заказ, работая вместе?

Answer 1

Швея выполняет 1/4 в час работы
ученица 1/8 часть работы в час
за час вместе 1/4+1/8=3/8 работы
1/(3/8)=8/3=2 2/3 часа

Answer 2

Calculating Time Taken by a Seamstress and her Apprentice

To calculate the time taken by a seamstress and her apprentice to complete an order, we can use the formula:

1 / (time taken by seamstress) + 1 / (time taken by apprentice) = 1 / (time taken when working together)

Given that the seamstress can complete the order in 4 hours and the apprentice in 8 hours, we can calculate the time taken when they work together.

Using the formula: 1 / 4 + 1 / 8 = 1 / x

Solving for x: 1 / 4 + 1 / 8 = 1 / x 0.25 + 0.125 = 1 / x 0.375 = 1 / x x = 1 / 0.375 x = 2.67 hours

Therefore, working together, the seamstress and her apprentice will complete the order in 2.67 hours.