IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 456 - 461 of 1091
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Question 456
Question MCQ▾
Two cubes have their volumes in the ratio 1: 64. Find the ratio of their surface areas.
Choices
Choice (4) | Response | |
---|---|---|
a. | 7: 9 | |
b. | 1: 16 | |
c. | 16: 3 | |
d. | 1: 9 |
Question 457
Question MCQ▾
The radius of a cylinder is tripled but its lateral surface area is unchanged. Then its height must be________.
Choices
Choice (4) | Response | |
---|---|---|
a. | Halved | |
b. | Constant | |
c. | One third | |
d. | Doubled |
Question 458
Question MCQ▾
A cylindrical tower is 7 meters in diameter and 15 meters height. The cost of white washing its curved surface at 75 paisa per is
Choices
Choice (4) | Response | |
---|---|---|
a. | 250 | |
b. | 247 | |
c. | 240 | |
d. | 257 |
Question 459
Question MCQ▾
A hoop is resting vertically at staircase as shown in the diagram. AB = 8 cm and BC = 4 cm. The radius of the hoop is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 12 cm | |
b. | 11 cm | |
c. | 14 cm | |
d. | 10 cm |
Question 460
Question MCQ▾
The radius of a cylinder is doubled but its lateral surface area is unchanged. Then its height must be________.
Choices
Choice (4) | Response | |
---|---|---|
a. | Tripled | |
b. | Constant | |
c. | Doubled | |
d. | Halved |
Question 461
Question MCQ▾
Between a square of perimeter 36 cm and a circle of circumference 36 cm, which figure has larger area and by how much?
Choices
Choice (4) | Response | |
---|---|---|
a. | Square, 22 | |
b. | Circle, 26 | |
c. | Circle, 22 | |
d. | All of the above |