11.
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- A.4 cm
- C.5 cm
- B.6 cm
- D.None of these
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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12.
If a diagonal of a square is doubled, how does the area of the square change?
- A.Becomes four-fold
- C.Becomes two-fold
- B.Becomes three-fold
- D.None of these
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Let originally, diagonal = x | ||||||||||||||
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| After increase, diagonal = 2x | ||||||||||||||
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13.
If the base of a parallelogram is (x + 4), altitude to the base is (x - 3) and the are is (x2 - 4), then the actual area is equal to
- A.4 sq units
- C.60 sq units
- B.48 sq units
- D.None of these
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Area of the parallelogram = base x altitude | |||||
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14.
If area of a triangle whose base is 6 cm is equal to the area of a circle of radius 6 cm, find the height of this triangle
- A.10 cm
- C.12 cm
- B.22 cm
- D.18 cm
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Radius of the circle = 6 cm | |||||||||||
| Area of the circle = 36 sq m | |||||||||||
| According to question: | |||||||||||
| Area of the triangle of base 6 cm = Area of the circle of radius 6 cm | |||||||||||
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15.
| A plot of land is in the shape of a right-angled isosceles triangle. The length of hypotenuse | |||
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- A.Less than Rs. 300
- C.more than Rs. 500
- B.less than Rs. 500
- D.None of these
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Let the length of each of equal sides of the triangle be x m. | ||||||
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