If the cost of x metres of wire is d rupees, then what is the cost of y metres of wire at the same rate?

Byadmin July 18, 2022

Question: If the cost of x metres of wire is d rupees, then what is the cost of y metres of wire at the same rate?
[A].

Rs.		xy
		d

[B].

Rs. (xd)

[C].

Rs. (yd)

[D].

Rs.		yd
		x

Answer: Option D

Explanation:

Cost of x metres = Rs. d.

Cost of 1 metre = Rs.		d
		x

Cost of y metres = Rs.		d	. y		= Rs.		yd	.
		x					x

Aptitude | Decimal Fraction

The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to:

Question:
The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to:

[A].

0.02
[B].
0.2
[C].
0.04
[D].
0.4

Answer: Option C

Explanation:

Given expression = (11.98)2 + (0.02)2 + 11.98 x x.

For the given expression to be a perfect square, we must have

11.98 x x = 2 x 11.98 x 0.02 or x = 0.04

Read More The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to:
Aptitude | Banker's Discount

The present worth of a sum due sometime hence is Rs. 576 and the banker’s gain is Rs. 16. The true discount is:

Question:
The present worth of a sum due sometime hence is Rs. 576 and the banker’s gain is Rs. 16. The true discount is:

[A].

Rs. 36
[B].
Rs. 72
[C].
Rs. 48
[D].
Rs. 96

Answer: Option D

Explanation:

T.D. = P.W. x B.G. = 576 x 16 = 96.

Read More The present worth of a sum due sometime hence is Rs. 576 and the banker’s gain is Rs. 16. The true discount is:
Aptitude | Probability

From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?

Question: From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?
[A].

1

15

[B].

25

57

[C].

35

256

[D].

1

221

Answer: Option D

Explanation:

Let S be the sample space.

Then, n(S) = 52C2 = (52 x 51) = 1326.

(2 x 1)

Let E = event of getting 2 kings out of 4.

n(E) = 4C2 = (4 x 3) = 6.

(2 x 1)

P(E) = n(E) = 6 = 1 .

n(S) 1326 221

Read More From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?
Compound Interest | Mathematics Mcqs

Find the compound interest accrued on an amount of Rs.14,800 at 13.5% p.a at the end of two years. (Round off your answer to nearest integer)

Find the compound interest accrued on an amount of Rs.14,800 at 13.5% p.a at the end of two years. (Round off your answer to nearest integer)

A. Rs.4273
B. Rs.4613
C. Rs.4064
D. Rs.4266
E. None of these
Explanation:
CI = 14800{ [ 1 + 13.5/100]2 – 1 }
= 14800 { [1 + 27/200]2 – 1
= 14800 { 2 + 27/200}{27/200}
= (74)[2 + 27/200](27) =
1998[2 + 27/200] = 3996 + 269.73 = Rs. 4266

Read More Find the compound interest accrued on an amount of Rs.14,800 at 13.5% p.a at the end of two years. (Round off your answer to nearest integer)
Aptitude | Problems On Ages

The age of father 10 years ago was thrice the age of his son. Ten years hence, father’s age will be twice that of his son. The ratio of their present ages is:

Question: The age of father 10 years ago was thrice the age of his son. Ten years hence, father’s age will be twice that of his son. The ratio of their present ages is:
[A].

5 : 2
[B].
7 : 3
[C].
9 : 2
[D].
13 : 4

Answer: Option B

Explanation:

Let the ages of father and son 10 years ago be 3x and x years respectively.

Then, (3x + 10) + 10 = 2[(x + 10) + 10]

3x + 20 = 2x + 40

x = 20.

Required ratio = (3x + 10) : (x + 10) = 70 : 30 = 7 : 3.

Read More The age of father 10 years ago was thrice the age of his son. Ten years hence, father’s age will be twice that of his son. The ratio of their present ages is:
Aptitude | Simplification

In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets Rs. 2.40 per hour for regular work and Rs. 3.20 per hours for overtime. If he earns Rs. 432 in 4 weeks, then how many hours does he work for ?

Question:
In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets Rs. 2.40 per hour for regular work and Rs. 3.20 per hours for overtime. If he earns Rs. 432 in 4 weeks, then how many hours does he work for ?

[A].

160
[B].
175
[C].
180
[D].
195

Answer: Option B

Explanation:

Suppose the man works overtime for x hours.

Now, working hours in 4 weeks = (5 x 8 x 4) = 160.

160 x 2.40 + x x 3.20 = 432

3.20x = 432 – 384 = 48

x = 15.

Hence, total hours of work = (160 + 15) = 175.

Read More In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets Rs. 2.40 per hour for regular work and Rs. 3.20 per hours for overtime. If he earns Rs. 432 in 4 weeks, then how many hours does he work for ?

Then, n(S) = 52C2 =	(52 x 51)	= 1326.
	(2 x 1)

n(E) = 4C2 =	(4 x 3)	= 6.
	(2 x 1)

P(E) =	n(E)	=	6	=	1	.
	n(S)		1326		221

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