Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q11. |
|
| 1) | 344.35 cm2 | 2) | 462 cm2 |
| 3) | 498.35 cm2 | 4) | 456cm2 |
| 5) | None of these | ||
Answer : 498.35 cm2
Explanation :
Explanation :
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Q12. |
|
| 1) | 18.8 cm | 2) | 23.5 cm |
| 3) | 24 cm | 4) | 31.3cm |
| 5) | None of these | ||
Answer : 24 cm
Explanation :
Explanation :
The final ratio of the triangle are 20 : 15 : 12
Perimeter = 20x + 15x + 12x = 47 x
So, 47x = 94
or = x = 2
Thus smallest side = 122 = 24 cm.
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Q13. |
|
| 1) | 16 cm | 2) | 18 cm |
| 3) | 24 cm | 4) | Data Inadequate |
| 5) | None of these | ||
Answer : 18 cm
Explanation :
Explanation :
2(l + b) /b = 5/1 or 2l + 2b = 5b
or 3b = 2l b =2l/3
Then, Area = 216 cm2
l x b = 216
l x2l/3 = 216 or l2 = 324
or l = 18 cm.
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Q14. |
|
| 1) | 15 mtrs | 2) | 26 mtrs |
| 3) | 25 mtrs | 4) | 20 mtrs |
| 5) | None of these | ||
Answer : 20 mtrs
Explanation :
Explanation :
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Q15. |
|
| 1) | 132 sq.m | 2) | 155 sq. m |
| 3) | 135 ares | 4) | 155 ares |
| 5) | None of these | ||
Answer : 135 ares
Explanation :
Explanation :
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Q16. | A rectangular carpet has an area of 60m2. Its diagonal and longer side together equal to five times the shorter side. What is the length of the carpet ? |
| 1) | 5m | 2) | 12m |
| 3) | 15m | 4) | 24m |
| 5) | None of these | ||
Answer : 12m
Explanation : Given, lb = 60 m2
Explanation : Given, lb = 60 m2
and d2 = l2 + b2 and d + l = 5b
or d = 5b - l
So, d2 = 25b2 + l2 - 10bl
or l2 + b2 = 25 b2 + l2 - 10 x 60
or 24 b2 = 600
or b = 5
Therefore, l = 60/5 = 12 m
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Q17. | The length of a rectangular plot of land is three times as much as its breadth. A playground measuring 1200 sq. ft. occupies one-forth of the total area of the plot.What is the length of the plot ? |
| 1) | 40 | 2) | 120 |
| 3) | 360 | 4) | Data Inadequate |
| 5) | None of these | ||
Answer : 120
Explanation : Let, the length of and breadth of the rectangular plot of land be 3x and x respectively.
Explanation : Let, the length of and breadth of the rectangular plot of land be 3x and x respectively.
Total area of the plot = 4 x 1200 = 1200 sq. ft.
So, 3x x x = 4800
or 3x2 = 4800
or x = 40 ft.
Therefore length = 3 x 40 =120 ft.
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Q18. |
|
| 1) | 15 m | 2) | 17.5 m |
| 3) | 24 m | 4) | 20 m |
| 5) | None of these | ||
Answer : 20 m
Explanation :
Explanation :
The area of a square is 225 m2.
Sides of the square is = 15 m.
So, perimeter = 15 X 4 = 60 mts.
Given that perimeter of the equilateral triangle is also equal
3x = 60
or x = 60/3 = 20 mtrs
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Q19. |
|
| 1) | x/2 | 2) | x |
| 3) | 2x | 4) | 3x |
| 5) | None of these | ||
Answer : 2x
Explanation :
Explanation :
Area of a square is x2.
Area of the triangle is ½ x.
Let, the altitude be h.
x2 = ½ xh ½ h = x h = 2x.
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Q20. | The length of a rectangle is 4mtrs more than the side of a square and the breadth of the rectangle is 4mtrs less than the same square. If the area of the square is 567m2, what is the area of the rectangle ? SBI PO(Prelm.) -2015 |
| 1) | 549m2 | 2) | 545m2 |
| 3) | 557m2 | 4) | 559m2 |
| 5) | None of these | ||
Answer : None of these
Explanation : Given area = 567m2 . So, each side = 23.81m
Explanation : Given area = 567m2 . So, each side = 23.81m
Length = 23.81 + 4 = 27.81m
Breadth of the rectangle = 23.81 - 4 = 19.81m
Thus, area of the 27.81 x 19.81 = 550.91 = 551 m
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