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- Question
The area of an equilateral triangle is 9?3 sq cm, find height of the triangle?
Options- A. 6 cm
- B. 6?3 cm
- C. 3?3 cm
- D. 9 cm
- Correct Answer
- 3?3 cm
- 1. In a triangle the length of the side opposite the right angle is 9?3 cm, what is the length of the side opposite to the angle which measures 30 degree?
Options- A. 9 cm
- B. 3?3 cm
- C. 6 cm
- D. (9?3)/2 cm Discuss
- 2. What is the area (in sq cm) of an equilateral triangle of side 6 cm?
Options- A. 36?3
- B. 9
- C. 36
- D. 9?3 Discuss
- 3. The angles of a triangle are in the ratio 1 : 1 : 4. If the perimeter of the triangle is k times its largest side, then what is the value of k?
Options- A. 1 + 2/?3
- B. 1 - 2/?3
- C. 2 + 2/?3
- D. 2 Discuss
- 4. The cost of leveling a triangular piece of land whose sides are 72 m. 30 m and 78 in respectively at the rate of 20 paisa per square metre is:
Options- A. Rs. 220
- B. Rs. 200
- C. Rs. 216
- D. Rs. 210 Discuss
- 5. A solid copper sphere of radius 9 cm is melted and reformed into a wire of radius 1 mm. What will be the length of this wire? (Take ? = 22/7)
Options- A. 1166.4 metres
- B. 1458 metres
- C. 777.6 metres
- D. 972 metres Discuss
- 6. What is the area (in sq cm) of a circle whose circumference is 26.4 cm?
Options- A. 55.44
- B. 44.55
- C. 33.44
- D. 44.33 Discuss
- 7. What is the area (in sq cm) of a circle whose circumference is 22 cm?
Options- A. 77
- B. 38.5
- C. 44
- D. 88 Discuss
- 8. The area of a triangle with vertices A (0, 8) , O (0,0) and B (5, 0) is:
Options- A. 8 sq. units
- B. 13 sq. units
- C. 20 sq. units
- D. 40 sq. units Discuss
- 9. Three medians AD, BE and CF of ?ABC intersect at G; Area of ?ABC is 36 sq cm. Then the area of ?CGE is
Options- A. 12 sq cm
- B. 6 sq cm
- C. 9 sq cm
- D. 18 sq cm Discuss
- 10. The length of a rectangular plot is 20 metres more than its breadth. If the cost of fencing the plot @ 26.50 per metre is Rs. 5300, what is the length of the plot in metres?
Options- A. 40
- B. 120
- C. 50
- D. None of these Discuss
Area problems
Search Results
Correct Answer: (9?3)/2 cm
Correct Answer: 9?3
Correct Answer: 1 + 2/?3
Correct Answer: Rs. 216
Correct Answer: 972 metres
Correct Answer: 55.44
Correct Answer: 38.5
Correct Answer: 20 sq. units
Correct Answer: 6 sq cm
Correct Answer: None of these
Explanation:
Let breadth = x metres.
Then, length = (x + 20) metres.
Perimeter = 5300 m = 200 m. 26.50
2[(x + 20) + x] = 200
2x + 20 = 100
2x = 80
x = 40.
Hence, length = x + 20 = 60 m.
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