Câu 2: Trang 124 - Toán tiếng anh lớp 5:The radio of the volumes of the two following cubes is 2 :...

b) Therefore, the volume of the larger cube is 2 units.

b) To find the volume of the larger cube, we can use the ratio given. Let the volume of the smaller cube be represented by x. Since the ratio of the volumes is 2:3, the volume of the larger cube would be 2x. Given that the total volume of the two cubes is 2x + 3x = 5x, and we can find the value of x by assuming a convenient volume for the smaller cube, say 1 unit. Therefore, the volume of the larger cube would be 2*1=2 units.

a) The percentage of the volume of the larger cube that is equal to that of the smaller cube can be calculated using the ratio of their volumes. Since the ratio of the volumes is 2:3, this means that the larger cube's volume is 2 parts and the smaller cube's volume is 3 parts. To find the percentage, we take 2 parts out of the total of 2+3=5 parts, which is 2/5 = 40%. Therefore, 40% of the volume of the larger cube is equal to that of the smaller cube.