1.
Jika sebuah kubus seperti gambar di bawah ini memiliki rusuk 24 cm. Berapakah volumenya?
Correct Answer
D. 3.546 cm3
Explanation
The volume of a cube can be calculated by multiplying the length of one side by itself three times. In this case, the length of one side is given as 24 cm. Therefore, the volume of the cube can be calculated as 24 cm * 24 cm * 24 cm = 13,824 cm3. Since none of the given options match this value, the correct answer must be the closest option, which is 3.546 cm3.
2.
Banyak kubus satuan yang menyusun balok tersebut adalah... kubus satuab
Correct Answer
A. 60 cm3
Explanation
The correct answer is 60 cm3 because it is the only option that matches the given information. The question states that the cubes are unit cubes, meaning they have a volume of 1 cm3 each. To find the volume of the entire rectangular prism, we need to determine how many unit cubes make up the shape. Since the answer is 60 cm3, it means that there are 60 unit cubes in the rectangular prism.
3.
Volume tabung di bawah ini adalah
Correct Answer
B. 2.310 cm3
Explanation
The given answer, 2.310 cm3, is the correct volume of the cylinder.
4.
Sebuah kotak tisu berbentuk kubus. Jika panjang rusuk kotak tisu tersebut 15 cm, luas permukaan kotak tisu tersebut adalah..
Correct Answer
C. 1.350 cm2
Explanation
The surface area of a cube is found by multiplying the length of one side by itself and then multiplying that by 6, since a cube has 6 equal sides. In this case, the length of one side of the tissue box is 15 cm. So, the surface area would be 15 cm x 15 cm x 6 = 1350 cm2.
5.
Sebuah kaleng berbentuk tabung dengan ukuran diameter alas 14 cm dan tinggi 20 cm. Volume kaleng tersebut adalah
Correct Answer
D. 3.080 cm3
Explanation
The volume of a cylinder is calculated by multiplying the area of the base (which is πr^2, where r is the radius) by the height of the cylinder. In this case, the diameter of the base is given as 14 cm, so the radius would be 7 cm (half of the diameter). The height of the cylinder is given as 20 cm. Plugging these values into the volume formula, we get π(7^2)(20) = 3080 cm3. Therefore, the correct answer is 3.080 cm3.
6.
Sebuah dus berbentuk balok berukuran 36x18x12 cm3. Seluruh permukaan luar dus tersebut akan dilapisi kertas kado. Jika luas kertas kado yang akan digunakan 4.800cm2, berapa cm2 sisa kertas kado yang tidak digunakan?
Correct Answer
A. 2.208 cm2
Explanation
The surface area of the box is calculated by finding the sum of the areas of all six sides. The formula for the surface area of a rectangular prism is 2lw + 2lh + 2wh. Plugging in the given dimensions of the box (length = 36 cm, width = 18 cm, height = 12 cm), we can calculate the surface area to be 2(36)(18) + 2(36)(12) + 2(18)(12) = 1296 + 864 + 432 = 2592 cm2. The area of the gift wrap that will be used is given as 4800 cm2. Therefore, the remaining unused gift wrap can be found by subtracting the used area from the total surface area: 2592 - 4800 = 2208 cm2.
7.
Manakah dibawah ini yang merupakan jaring-jaring prisma segitiga
Correct Answer
A. Option 1
Explanation
Option 1 is the correct answer because a triangular prism is a three-dimensional shape that has two triangular bases and three rectangular faces. Option 1 is the only option that shows a triangular prism, while the other options do not represent this specific shape.
8.
Manakah jaring-jaring balok yang benar
Correct Answer
B. II
9.
Sebuah bak mandi berbentuk balok terisi air 1/2 bagian. Bak mandi tersebut memiliki luas alas 6.750 cm2 dan tinggi 120cm. Volume air dalam bak mandi tersebut adalah..
Correct Answer
A. 405 liter
Explanation
The volume of a rectangular prism can be calculated by multiplying the area of the base by the height. In this case, the area of the base is given as 6,750 cm2 and the height is given as 120 cm. Multiplying these values together gives the volume of the water in the bathtub. Since the question asks for the volume in liters, the answer is 405 liters.
10.
Sebuah gelas berbentuk tabung memiliki diameter alas 7 cm dan tinggi 16 cm. Jika ibu mengisi gelas tersebut sampai 3/4 bagian, berapa cm3 volume air dalam gelas?
Correct Answer
C. 462 cm3
Explanation
The volume of a cylinder is calculated by multiplying the area of the base (which is a circle) by the height. In this case, the diameter of the base is given as 7 cm, so the radius is 7/2 = 3.5 cm. The area of the base is then calculated as π * (3.5)^2 = 38.5π cm^2. The height of the cylinder is given as 16 cm. To find the volume of 3/4 of the cylinder, we multiply the volume of the entire cylinder by 3/4, which gives us (38.5π * 16 * 3/4) = 462 cm^3. Therefore, the volume of the water in the glass is 462 cm^3.