Question

50 БАЛОВ!!! РЕБЯТ, ПОМОГИТЕ СРОЧНО!!!Для будівельних робіт потрібно 90 м3 сухого піску. Скільки рейсів має зробити для перевезення піску вантажний автомобіль вантажністю 4,5 т ?

Answer 1

90*1500=../4500=30 рейсов




....

Answer 2

V=90 м3, М1=4500 кг,р=1500 кг /м3; Найти N. Решение: N=V/V1; V1= м1/р, N=Vp/м1= 90*1500/4500=30 рейсов

Answer 3

Calculating the Number of Trips Required to Transport Sand

To calculate the number of trips a freight truck needs to make to transport 90 m3 of dry sand, we can use the following formula:

Number of trips = Total volume of sand / Volume of sand the truck can carry per trip

In this case, the total volume of sand is 90 m3, and the truck can carry 4.5 tons of sand per trip. To proceed with the calculation, we need to convert the weight of the sand to volume, as the truck's capacity is given in weight, not volume.

Converting Weight to Volume

To convert the weight of the sand to volume, we need to know the density of dry sand. The density of dry sand can vary, but a commonly used value is around 1.6 tons/m3.

Using this density, we can calculate the volume of 4.5 tons of dry sand:

Volume = Weight / Density

Volume = 4.5 tons / 1.6 tons/m3

Volume ≈ 2.8125 m3

Now that we have the volume of sand the truck can carry per trip, we can proceed to calculate the number of trips required.

Calculating the Number of Trips

Using the formula mentioned earlier:

Number of trips = Total volume of sand / Volume of sand the truck can carry per trip

Number of trips = 90 m3 / 2.8125 m3

Number of trips ≈ 32

So, the freight truck would need to make approximately 32 trips to transport 90 m3 of dry sand, assuming a truck capacity of 4.5 tons per trip.