Question

В классе 20 парт.длина крышки парты 110см,ширина 50см.сколько нужно краски,чтобы покрасить крышки парт,если на 1м(квадратный)требуется 100 г краски? помогити плиз с краткой записью!!!

Answer 1

Парт-20 штДлина-110 смШирина-50 см1 кв.м-100 грСк-ко краски-?1) 110см х 50 см =5500 кв. см-( 1 парта)2) 5500 кв. см  х 20 =110000 км см  1 кв. м=10000 кв см 3) 110000 кв см : 10000 кв см = 11 кв м4) 11 кв м  х 100 г= 1100 гОтвет: На парты необходимо 1 кг 100 г краски 

Answer 2

Calculation of Paint Needed to Cover Desk Tops

To calculate the amount of paint needed to cover the desk tops, we need to determine the total surface area of the desk tops and then calculate the amount of paint required based on the given coverage rate.

Given: - Number of desks: 20 - Length of desk top: 110 cm - Width of desk top: 50 cm - Paint coverage rate: 100 g per 1 square meter

Calculation Steps:

1. Calculate the surface area of one desk top: - Surface area = Length x Width - Surface area = 110 cm x 50 cm = 5500 square cm

2. Convert the surface area to square meters: - 1 square meter = 10,000 square cm - Surface area in square meters = 5500 square cm / 10,000 = 0.55 square meters

3. Calculate the total surface area of all desk tops: - Total surface area = Surface area of one desk top x Number of desks - Total surface area = 0.55 square meters x 20 = 11 square meters

4. Calculate the amount of paint needed: - Amount of paint = Total surface area x Paint coverage rate - Amount of paint = 11 square meters x 100 g = 1100 g

Therefore, you will need 1100 grams of paint to cover the desk tops of 20 desks, given that the paint coverage rate is 100 grams per 1 square meter.

Please note that the above calculation assumes that the desk tops are flat and have no irregularities or additional surfaces that need to be painted.