It is known that the density of bricks is 1.5 × 103kg / m3. The walls of a house are built with 25cm long, 12cm wide and 6cm thick bricks. If the total area of the internal and external walls of the house is 720M2 5. It is known that the density of brick is 1.5 × 103 kg / m3, and the wall of the house is built with 25 cm long, 12 cm wide and 6 cm thick bricks. If the total area of the internal and external walls of the house is 720 square meters, and the thickness of the wall is 25 cm, the construction of the house will need bricks_______ If the car can carry 4 tons at a time, it should be pulled at least______ It's only three times before you can pull these bricks

It is known that the density of bricks is 1.5 × 103kg / m3. The walls of a house are built with 25cm long, 12cm wide and 6cm thick bricks. If the total area of the internal and external walls of the house is 720M2 5. It is known that the density of brick is 1.5 × 103 kg / m3, and the wall of the house is built with 25 cm long, 12 cm wide and 6 cm thick bricks. If the total area of the internal and external walls of the house is 720 square meters, and the thickness of the wall is 25 cm, the construction of the house will need bricks_______ If the car can carry 4 tons at a time, it should be pulled at least______ It's only three times before you can pull these bricks

First question: 720 * 0.25 / (0.25 * 0.12 * 0.06) = 100000 yuan
Second question: the weight of brick is 720 * 0.25 * 1.5 * 1000 = 270000kg
270000 / 1000 = 270 tons
270 / 4 = 67.5 ~ 68 cars

Build a wall of 10 cm long, 40 cm wide and 6 m high with bricks. The density of bricks is 1.5 × 10 cubic kilogram per cubic meter. If the mud mass is not taken into account, it will be very difficult

V = 0.1 * 0.4 * 6 = 0.24 (M3), M = PV = 1500 * 0.24 = 360kg,

If the density of brick is 2 × 103kg / m3 and the volume of a brick is 1.4 × 103cm3, how many bricks can a car with a loading capacity of 4T transport at most?

The mass of a brick is m = ρ v = 2 × 103kg / m3 × 1.4 × 10-3m3 = 2.8kg. A car with a loading capacity of 4T can transport 1428 pieces at most. A: a car with a loading capacity of 4T can transport 1428 pieces at most

Firefighters build a training wall 8 meters long, 2.4 meters wide and 2 meters high. If 525 bricks are used per cubic meter, how many bricks should be used at least

First, the volume of 8 × 2.4 × 2 = 38.4 is calculated
The number of bricks used is 38.4 × 525 = 20160