aptitude mensuration mcq pdf Model Questions & Answers, Practice Test for ibps rrb so officer sclae 2 3 single exam 2024
ibps rrb so officer sclae 2 3 single exam 2024 SYLLABUS WISE SUBJECTS MCQs
Number System
Lcm & Hcf
Ratio & Proportion
Percentage
Time & Work
Mensuration
Advance Math
Trigonometric Ratios & Identities
Average
Profit & Loss
In the figure given above, ABCD is a square in which AO = AX What is ∠XOB ?
Answer: (b)
Let ∠XOB = θ
In ΔOXB,
∠XOB + ∠OBX + ∠OXB = 180°
⇒ θ + 45° + ∠OXB = 180°
⇒ ∠OXB= 180° – 45° – θ
⇒ ∠OXB= 135° – θ
Here, ∠OXA + ∠OXB = 180°
⇒ ∠OXA + 135° – θ = 180°
⇒ ∠OXA= 45° + θ
In ΔOAX,
AO = AX
∴ ∠OXA= ∠AOX = 45° + θ
Since, ∠AOX+ ∠XOB = 90°
⇒ 45 + θ + θ ∼ = 90°
⇒ 2θ = 45°
∴ θ = 22.5°
The diameter of base of a right circular cone is 7 cm and slant height is 10 cm, then what is its lateral surface area?
Answer: (b)
Diameter of a cone = 7 cm
∴ Radius of cone = $7/2$ cm
Slant height of a right circular cone (l) = 10 cm
∴ Lateral surface area of a cone = π r l
= ${22}/7 × 7/2 × 10 = 11 × 10 = cm^2$
In the above figure, what is x equal to?
Answer: (a)
In ΔADC, ∠ADB = 180° – ∠ADC = 180° – 60° = 120°
∠DAC = 180° – 60° – 30° = 90°
Again, in right angled ΔDAC,
tan 60° = ${AC}/{DA} ⇒ √3 = a/x ⇒ x = a/√3$
What will be the cost to plaster the inner surface of a well 14 m deep and 4 m in diameter at the rate of Rs.25 per sq m?
Answer: (a)
Curved surface area of the well = 2 πrh
= $2 × {22}/7 × 2 × 14 = 176 m^2$
∴ Expense of getting per square metre plastered = Rs.25
∴ Expense of 176 $m^2$ = 176 × 25
= Rs.4400
In the given figure below LOM is a straight line.What is the value of x° ?
Answer: (c)
From the given figure. We know that sum of all angles is 180° because of straight lines.
∠LOQ +∠QOP + ∠POM = 180°
∴ (x° + 20°) + 50° + (x° – 10°) = 180°
⇒ 2x° + 60° = 180°
⇒ 2x° = 120°
x° = 60°
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