Basic Maths and Reasoning MCQs (page 132 of 212)
Percentages, ratios, averages, profit and loss, speed and time, number series and simple logical reasoning, with the working shown for every answer.
4,221 questions. Select an option to check your answer, or open "Show answer". Showing 2621–2640.
- 2621.
Taking π = 22/7, what is the circumference of a circle of radius 7 cm?
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Answer: B. 44 cm
Circumference = 2πr = 2 × 22/7 × 7 = 44 cm.
- 2622.
Taking π = 22/7, what is the area of a circle of radius 14 cm?
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Answer: C. 616 cm²
Area = πr² = 22/7 × 14 × 14 = 616 cm².
- 2623.
Taking π = 22/7, what is the circumference of a circle of radius 14 cm?
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Answer: B. 88 cm
Circumference = 2πr = 2 × 22/7 × 14 = 88 cm.
- 2624.
Taking π = 22/7, what is the area of a circle of radius 21 cm?
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Answer: C. 1,386 cm²
Area = πr² = 22/7 × 21 × 21 = 1,386 cm².
- 2625.
Taking π = 22/7, what is the circumference of a circle of radius 21 cm?
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Answer: B. 132 cm
Circumference = 2πr = 2 × 22/7 × 21 = 132 cm.
- 2626.
Taking π = 22/7, what is the area of a circle of radius 28 cm?
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Answer: C. 2,464 cm²
Area = πr² = 22/7 × 28 × 28 = 2,464 cm².
- 2627.
Taking π = 22/7, what is the circumference of a circle of radius 28 cm?
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Answer: B. 176 cm
Circumference = 2πr = 2 × 22/7 × 28 = 176 cm.
- 2628.
Taking π = 22/7, what is the area of a circle of radius 35 cm?
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Answer: C. 3,850 cm²
Area = πr² = 22/7 × 35 × 35 = 3,850 cm².
- 2629.
Taking π = 22/7, what is the circumference of a circle of radius 35 cm?
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Answer: B. 220 cm
Circumference = 2πr = 2 × 22/7 × 35 = 220 cm.
- 2630.
Taking π = 22/7, what is the circumference of a circle of radius 42 cm?
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Answer: B. 264 cm
Circumference = 2πr = 2 × 22/7 × 42 = 264 cm.
- 2631.
Taking π = 22/7, what is the area of a circle of radius 49 cm?
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Answer: C. 7,546 cm²
Area = πr² = 22/7 × 49 × 49 = 7,546 cm².
- 2632.
Taking π = 22/7, what is the area of a circle of radius 56 cm?
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Answer: C. 9,856 cm²
Area = πr² = 22/7 × 56 × 56 = 9,856 cm².
- 2633.
Taking π = 22/7, what is the circumference of a circle of radius 56 cm?
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Answer: B. 352 cm
Circumference = 2πr = 2 × 22/7 × 56 = 352 cm.
- 2634.
Taking π = 22/7, what is the area of a circle of radius 63 cm?
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Answer: C. 12,474 cm²
Area = πr² = 22/7 × 63 × 63 = 12,474 cm².
- 2635.
Taking π = 22/7, what is the area of a circle of radius 70 cm?
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Answer: C. 15,400 cm²
Area = πr² = 22/7 × 70 × 70 = 15,400 cm².
- 2636.
Taking π = 22/7, what is the circumference of a circle of radius 70 cm?
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Answer: B. 440 cm
Circumference = 2πr = 2 × 22/7 × 70 = 440 cm.
- 2637.
What is the area of a triangle with base 36 cm and height 24 cm?
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Answer: A. 432 cm²
Area = ½ × base × height = ½ × 36 × 24 = 432 cm².
- 2638.
What is the area of a triangle with base 6 cm and height 20 cm?
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Answer: A. 60 cm²
Area = ½ × base × height = ½ × 6 × 20 = 60 cm².
- 2639.
What is the area of a triangle with base 4 cm and height 7 cm?
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Answer: C. 14 cm²
Area = ½ × base × height = ½ × 4 × 7 = 14 cm².
- 2640.
What is the area of a triangle with base 8 cm and height 7 cm?
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Answer: B. 28 cm²
Area = ½ × base × height = ½ × 8 × 7 = 28 cm².