Question

Оля за час раскрашивает 1 кв.метр задника сцены,а Оксана - 2 кв.метра.Сколько кв.метров,работая вместе,они раскрасят за 3 часа?За сколько дней,работая вместе,они раскрасят задник сцены площадью 60 кв.метров,если будут каждый день работать по 4 часа?

Answer 1

1+2=3кв.м-раскрасят вместе за 1 час.

3*3=9кв.м-раскасят вместе за 3 часа.

60:3=за 20 часов -раскрасят вместе 60кв.м.

20:4=за 5 дней-раскрасят работая вместе 60кв.м.

Answer 2

за 1 час О. и О. раскрашивают 3 кв. м.(1+2=3) за 3 ч они раскрасят 9 кв. м.(3*3=9) если они будут работать по 4 часа, то за 4 часа они раскрасят 12кв. м. (3*4=12). чтобы раскрасить 60 кв.м. им нужно работать 5 дней (60/12=5)

Answer 3

Calculation of Work Rate

To solve this problem, we need to calculate the work rate of Olga and Oksana individually and then combine their work rates when they work together.

Olga can paint 1 square meter of the backdrop in 1 hour, while Oksana can paint 2 square meters in 1 hour. Let's calculate their individual work rates:

- Olga's work rate: 1 square meter per hour - Oksana's work rate: 2 square meters per hour

Work Done in 3 Hours

To find out how much area they can paint together in 3 hours, we need to calculate their combined work rate.

When working together, their work rates are additive. So, the combined work rate is the sum of their individual work rates:

- Combined work rate: Olga's work rate + Oksana's work rate = 1 square meter per hour + 2 square meters per hour = 3 square meters per hour

Now, we can calculate the total area they can paint in 3 hours using the combined work rate:

- Total area painted in 3 hours: Combined work rate * Time = 3 square meters per hour * 3 hours = 9 square meters

Therefore, working together for 3 hours, Olga and Oksana can paint 9 square meters of the backdrop.

Time to Paint a 60 Square Meter Backdrop

To find out how many days it will take for them to paint a 60 square meter backdrop, we need to calculate their combined work rate and divide the total area by the combined work rate.

When they work together, their combined work rate is still 3 square meters per hour.

To convert the time from hours to days, we need to consider that they work 4 hours each day.

- Combined work rate per day: Combined work rate * Time per day = 3 square meters per hour * 4 hours = 12 square meters per day

Now, we can calculate the number of days required to paint a 60 square meter backdrop:

- Number of days required: Total area / Combined work rate per day = 60 square meters / 12 square meters per day = 5 days

Therefore, working together for 4 hours each day, Olga and Oksana can paint a 60 square meter backdrop in 5 days.