Question

ШИРИНА ПРЯМОУГОЛЬНИКА РАВНА 40 СМ, его длина составляет 135% ширины. Найдите периметр и плошадь прямоугольника. №2Отправившисть в морское путешествие, экипаж яхты взял с собой 2400 л. пресной воды. Каждую неделю он тратил 15% того запаса воды, который у него был в начале этой недели. сколько литров воды осталось через неделлю путешествия? Через две недели?

Answer 1

№1

а=40см=100%, b=135%от а

1%=40/100=0,4см

135*0,4=54см это длина и

Р=(а+b)*2=(40+54)*2=188cм   периметр 

S=ab=40*54=2160cм^2

№2

2400л=100%

1%=2400/100=24л

15*24=360л потратили за 1 неделю

2400-360=2040л осталось спустя неделю

2400-(360*2)=1680л осталось спустя 2 недели

Answer 2

Calculation of Perimeter and Area of a Rectangle

To find the perimeter and area of a rectangle, we need to know its width and length.

Given that the width of the rectangle is 40 cm and its length is 135% of the width, we can calculate the length as follows:

Length = 135% of Width = 135/100 * Width = 135/100 * 40 cm = 54 cm.

Now that we have the width and length, we can calculate the perimeter and area of the rectangle.

Perimeter of a Rectangle is given by the formula: 2 * (Length + Width). Substituting the values, we get: Perimeter = 2 * (54 cm + 40 cm) = 2 * 94 cm = 188 cm.

Area of a Rectangle is given by the formula: Length * Width. Substituting the values, we get: Area = 54 cm * 40 cm = 2160 cm^2.

Therefore, the perimeter of the rectangle is 188 cm and the area is 2160 cm^2.

Calculation of Remaining Water after One Week and Two Weeks

The yacht's crew took 2400 liters of fresh water for their sea voyage. Every week, they consumed 15% of the water they had at the beginning of that week.

To calculate the remaining water after one week, we need to subtract 15% of the initial water supply from the total.

Remaining water after one week = Initial water supply - (15/100 * Initial water supply).

Substituting the values, we get: Remaining water after one week = 2400 liters - (15/100 * 2400 liters) = 2400 liters - 360 liters = 2040 liters.

To calculate the remaining water after two weeks, we need to subtract 15% of the remaining water after one week from the total remaining water.

Remaining water after two weeks = Remaining water after one week - (15/100 * Remaining water after one week).

Substituting the values, we get: Remaining water after two weeks = 2040 liters - (15/100 * 2040 liters) = 2040 liters - 306 liters = 1734 liters.

Therefore, after one week of the journey, there will be 2040 liters of water remaining, and after two weeks, there will be 1734 liters of water remaining.

Please let me know if there's anything else I can help you with!