The question below is followed by three statements I, II and III. You have to determine whether the data given is sufficient for answering the question. You should use the data and your knowledge of mathematics to choose the best possible answer. What is the ratio of the volume of the cube to the volume of the cuboid? Statement I: The Total Surface Area of the cuboid is 550 cm2 and the ratio of the length, breadth and height of the cuboid is 2 : 3 : 1. Statement II: The Total Surface Area of the cube is 384 cm2. Statement III: The breadth of the cuboid is 1.5 times of the length of the cuboid and 3 times of the height of the cuboid. The difference between the height and the length of the cuboid is 5 cm.
The question below is followed by three statements I, II and III. You have to determine whether the data given is sufficient for answering the question. You should use the data and your knowledge of mathematics to choose the best possible answer. What is the ratio of the volume of the cube to the volume of the cuboid? Statement I: The Total Surface Area of the cuboid is 550 cm2 and the ratio of the length, breadth and height of the cuboid is 2 : 3 : 1. Statement II: The Total Surface Area of the cube is 384 cm2. Statement III: The breadth of the cuboid is 1.5 times of the length of the cuboid and 3 times of the height of the cuboid. The difference between the height and the length of the cuboid is 5 cm. Correct Answer Either statement I or III and statement II are sufficient to answer the question.
Statement I:
Total Surface Area of cuboid = 2 (lb + bh + hl)
Let length = 2x, breadth = 3x, height = x
∴ 550 = 2 (3x × 2x + 3x × x + x × 2x)
⇒ 275 = (6x2 + 2x2 + 3x2)
⇒ 275 = 11x2
⇒ x2 = 25
⇒ x = 5
∴ Length = 10 cm, Breadth = 15 cm, Height = 5 cm
Volume = lbh
⇒ 10 × 15 × 5 = 750 cm3
Statement II:
Total Surface Area of cube = 6s2
∴ 384 = 6s2
⇒ s2 = 64
⇒ s = 8 cm
Volume of the cube = s3
⇒ 83 = 512 cm3
Statement III:
Let height of the cuboid = x cm, length = 2x, breadth = 3x
∴ Difference of height and length = 2x - x
⇒ 5 = x
⇒ x = 5
∴ length = 10 cm, breadth = 15 cm, height = 5 cm
Volume of the cuboid = lbh
⇒ 10 × 15 × 5 = 750 cm3
∴ Either statement I or III and statement II are required to answer the question.