mensuration Model Questions & Answers, Practice Test for ssc mts tier 1 2024
ssc mts tier 1 2024 SYLLABUS WISE SUBJECTS MCQs
Number System
Lcm & Hcf
Power, Indices And Surds
Ratio & Proportion
Percentage
Time & Work
Time & Distance
Mensuration
A conical flask of base radius r and height h is full of milk. The milk is now poured into a cylinderical flask of radius 2r. What is the height to which the milk will rise in the flask?
Answer: (d)
Radius of conical flask = r
Height of conical flask = h
h r 2r x
∴ Volume of conical flask = $1/3 πr^2h$
Radius of cylindirical flask = 2r
Height of cylindirical flask = x
∴ Volume of cylindirical flask = π$(2r)^2$ x
= π$4r^2$x
According to question,
$1/3 πr^2h = 4πr^2x$
x = ${1.πr^2h}/{3 × 4πr^2} = h/{12}$
∴ Height of the cylinderical flask is . $h/{12}$
A square and an equilateral triangle have equal perimeter. If the diagonal of the square is 12 $√2$ cm, then the area of the triangle is
Answer: (d)
Diagonal of square = 12 $√2$cm ∼
Side of square = ∼ ${12 √2}/√2$ = 12cm ∼
Perimeter of square = 4 × 12 = 48 cm ∼
Perimeter of equilateral triangle = 48 cm ∼
Side of the equilateral triangle = ∼ ${48}/3$ = 16 cm
Area of triangle $√3/4 × (16)^2$
= $√3/4 × 256$
= 64$√3cm^2$ ∼
So, option (d) is correct. ∼
A, B, C and D are four distinct points on a circle whose centre is at O. If ∠OBD – ∠CDB = ∠CBD – ∠ODB, then what is ∠A equal to?
Answer: (c)
Given ∠OBD + ∠ODB = ∠CBD + ∠CDB
Let ∠OBD = ∠ODB = θ
and ∠DBC = $θ_1$ , ∠BDC = $θ_2$
θ + θ = $θ_1 + θ_2$ ... (i)
⇒ 2θ = $θ_1 + θ_2$
∴ ∠BOD = 180° – 2θ
⇒ ∠BCD = ${360° - (180° - 2 θ)}/2$
(by properties of circle)
⇒ 180° – $(θ_1 + θ_2)$ = 90° + θ
⇒ 180° – 2θ = 90° + θ
⇒ 90° = 3θ
⇒ θ = 30°
∴ ∠BOD = 120°
∠BAD = 60°
Two equal circles intersect such that each passes through the centre of the other. If the length of the common chord of the circles is 10 $√3$ cm, then what is the diameter of the circle ?
Answer: (a)
Let two circles with center O and O' intersect each other at point A and B, such that AB is a common chord.
Then AB = 10 $√3$ cm (Given)
Since both passes through the center of each other as shown in figure
So, $O_1$O is the radius of both circle
Let $O_1O = r = AO_1$ = AO
AX = AB/2 = 5 $√3$ cm
(Since OX is perpendicular to chord AB, so bisects it)
AO$O_1$ forms an equilateral triangle with side = radius = r
sin 60 = $√3/2 = {AX}/{AO} = {5√3}/r$
⇒ So r = 10 cm
⇒ diameter = 20 cm
In the figure given below, AC is parallel to ED andAB =DE =5 cm and BC = 7 cm. What is the area ABDE : area BDE : area BCD equal to ?
Answer: (b)
Let height of triangle be = h
as ΔABDE = 5 × h
ar ΔBDE = $1/2$ × 5 × h
ar ΔBCD = $1/2$ × 7 × h
Ratio = 5h : ${5h}/2 : {7h}/2$
= 10 : 5 : 7
ssc mts tier 1 2024 IMPORTANT QUESTION AND ANSWERS
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