6.
The length of a rectangular plot of land is three times as much as its breadth. A playground measuring 1200 sq. ft. occupies one-fourth of the total area of the plot. What is the length of the plot in feet?
- A.40
- C.120
- B.360
- D.Data inadequate.
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Let the length and breath of the plot be 3x and x feet, respectively. | |||||
| Total area of the plot = 4 x 1200 = 4800 sq ft. | |||||
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7.
The length of each side of a triangle is 12 cm. The height of the triangle is
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A.
3 2 cm -
C.
6 2 cm
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B.
6 3 cm - D.None of these
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Each side = 12 cm | ||||||||||||||||||
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8.
If the sides of a rectangle are increased by 20% the percentage increase in its perimeter is
- A.80
- C.20
- B.40
- D.None of these
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| If length of the rectangle is L and its width is B, then its perimeter = 2(L + B) | ||||||
| Increased length = 1.2L, | ||||||
| Increased width = 1.2B | ||||||
| Increase perimeter = 2(1.2L + 1.2B) | ||||||
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| Increase in perimeter = 0.4(L + B) | ||||||
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9.
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| Find the area. |
- A.3648 cm
- C.3846 cm
- B.3468 Sq. m
- D.None of these
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
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| Now, perimeter of isosceles triangle = 2a + b | ||||||||||||
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10.
A man runs a circle of 50 m radius at a speed of 12 km per hour. Find the time taken by him for going around it ten times.
- A.10 min
- C.15.7 min
- B.12.5 min
- D.None of these
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Distance = 2 x 3.14 x 50 x 10 = 3140 m | ||||||
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