Question

№5 Из листа стекла шириной 65 см и длиной 76 см нужно вырезать прямоугольный кусок размером 52 см на 37 см, Найдите площадь оставшейся части стекла, №6 Вырази: в минутах: 12 ч, 150 ч, 400 ч ; в секундах: 9 мин, 45 мин, 128 мин Пожалуйста кто сможет сделайте два задания

Answer 1

65 * 76 = 4940см\2 - площадь стекла.
52 * 37 = 1924см\2 - площадь куска.
4940 - 1924 = 3016см\2 - площадь остатка.

12ч = 12* 60= 720 мин( в часу 60 мин)
150ч = 9000мин
400ч  = 24000мин
9мин = 9 * 60 = 540сек( в минуте 60 сек)
45мин = 2700сек
128мин = 7680сек

Answer 2

Task 5: Finding the Area of the Remaining Glass

To find the area of the remaining piece of glass after cutting out a 52 cm by 37 cm rectangle from a 65 cm by 76 cm piece, we can use the formula for the area of a rectangle.

The area of the remaining piece of glass can be calculated as follows: 1. Calculate the area of the original piece of glass. 2. Subtract the area of the cut-out rectangle from the area of the original piece of glass.

Let's calculate the area of the remaining piece of glass step by step.

1. Calculate the area of the original piece of glass: - The original piece of glass has a width of 65 cm and a length of 76 cm. - The area of the original piece of glass = width * length.

The area of the original piece of glass = 65 cm * 76 cm = 4940 square cm.

2. Calculate the area of the cut-out rectangle: - The cut-out rectangle has a width of 52 cm and a length of 37 cm. - The area of the cut-out rectangle = width * length.

The area of the cut-out rectangle = 52 cm * 37 cm = 1924 square cm.

3. Calculate the area of the remaining piece of glass: - The area of the remaining piece of glass = Area of the original piece of glass - Area of the cut-out rectangle.

The area of the remaining piece of glass = 4940 square cm - 1924 square cm = 3016 square cm.

Therefore, the area of the remaining piece of glass is 3016 square cm.

Task 6: Converting Hours to Minutes and Seconds

To express the given hours in minutes and seconds, we can use the following conversion factors: - 1 hour = 60 minutes - 1 minute = 60 seconds

Let's convert the given hours to minutes and seconds.

1. Converting 12 hours to minutes and seconds: - 12 hours = 12 * 60 minutes = 720 minutes - 12 hours = 12 * 60 * 60 seconds = 43200 seconds

Therefore, 12 hours is equal to 720 minutes and 43200 seconds.

2. Converting 150 hours to minutes and seconds: - 150 hours = 150 * 60 minutes = 9000 minutes - 150 hours = 150 * 60 * 60 seconds = 540000 seconds

Therefore, 150 hours is equal to 9000 minutes and 540000 seconds.

3. Converting 400 hours to minutes and seconds: - 400 hours = 400 * 60 minutes = 24000 minutes - 400 hours = 400 * 60 * 60 seconds = 1440000 seconds

Therefore, 400 hours is equal to 24000 minutes and 1440000 seconds.

I hope this helps! If you have any more questions or need further assistance, feel free to ask.