mensuration area volumes Model Questions & Answers, Practice Test for ssc mts paper 1 2023
ssc mts paper 1 2023 SYLLABUS WISE SUBJECTS MCQs
Number System
LCM & HCF
Ratio Proportion & Partnership
Percentages
Profit & Loss
Time & Work
Time & Distance
Simple Interest & Compound Interest
Mensuration: Area & Volumes
Algebraic Expressions
Trigonometric Ratios & Identity
Consider the following statements :
- ∼
- Let D be a point on the side BC of a triangle ABC. If area of triangle ABD = area of triangle ACD, then for all points O on' AD, area of triangle ABO = area of triangle ACO.
- If G is the point of concurrence of the medians of a triangle ABC, then area of triangle ABG = area of triangle BCG = area of triangle ACG.
Answer: (a)
Statement 1
AD divides ΔABC in equal area of two parts.
Then O is point on anywhere on AD
So area of triangle
ΔABO = ΔAOC,
So statement 1 is true.
Statement 2
G is the point of concurrence of the medians then
area of ΔABG = area of ΔBCG = Area of ΔACG
Both are true.
A grassy field has the shape of an equilateral triangle of side 6 m. A horse is tied to one of its vertices with a rope of length 4.2 m. The percentage of the total area of the field which is available for grazing is best approximated by
Answer: (a)
Suppose a horse is tied at vertex A. Then, area available grazing field is ADE.
Now, area of curve
ADE = ${π r^2 θ}/{360°} = {22 × (4.2)^2 × 60°}/{7 × 360°} = 9.24 m^2$
and area of equilateral Δ ABC = $√3/4 (side)^2$
= $√3/4 × (6)^2$ = 15.57
∴ Required percentage
= ${9.24}/{15.57}$ × 100 = 59.34% = 59% (approx)
Consider a trapezium ABCD, in which AB is parallel to CD and AD is perpendicular to AB. If the trapezium has an incircle which touches AB at E and CD at F, where EB = 25 cm and FC = 16 cm, then what is the diameter of the circle?
Answer: (d)
From tangent properties
CF = CG = 16
BE = BG = 25 H
∴ BC = 16 + 25 = 41 cm
From ΔBCH,
CH = diameter = $√{(41)^2 – (9)^2}$
= $√{1681 – 81}$
= $√{1600}$ = 40cm
A bucket is of a height 25 cm. Its top and bottom radii are 20 cm and 10 cm, respectively. Its capacity (in L) is
Answer: (b)
Given that,
Height of bucket = 25 cm
Radii of top (R) = 20 cm
radii of bottom (r) = 10 cm
∴ Capacity of bucket
= $π/3 h(R^2 + r^2 + Rr)$
= $π/3 × 25 (400 + 100 + 200) cm^3$
= $π/3 × 25 × 700 cm^3$
= $π/3 × {175 × 100}/{1000} = {17.5 π}/3$L
Let PQRS be the diameter of a circle of radius 9 cm. The length PQ, QR and RS are equal. Semi-circle is drawn with QS as diameter (as shown in the given figure). What is the ratio of the shaded region to that of the unshaded region?
Answer: (c)
${\text"Shaded Area"}/{\text"Total Area"} = {1/2 (π × 9^2 - π × 6^2)}/{π × 9^2} = 5/{18}$
∴ ${\text"Shaded area"}/{\text"Unshaded area"} = 5/{18 - 5} = 5/{13}$
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