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Wednesday, December 19, 2018

A trader buys some goods for Rs.150. If the overhead expense

December 19, 2018 |

General Aptitude, Percentage, RRB TC CC Exam (Bangalore) 2007, Solved

A trader buys some goods for Rs.150. If the overhead expenses be 12% of cost price, then at what price it be sold to earn 10%?

ARs.185.80

BRs.184.80

CRs.187.80

DRs.188.80

Nithin K Sun Sep 25 2016 12:30:00 GMT+0530 (IST)

Total cost price = $150 *{112 \over 100}$ =168

Profit is 10%

Selling price = cost price * profit

= $168 * {110 \over 100}$

=Rs. 184.80

View Answer

Tuesday, December 18, 2018

106 X 106 - 94 X 94 = ?

December 18, 2018 |

General Aptitude, Mathematical Operations, RRB TC CC Exam (Bangalore) 2007, Solved

106 X 106 - 94 X 94 = ?

A2004

B2400

C1904

D1906

Nithin K Fri Sep 30 2016 12:30:00 GMT+0530 (IST)

Answer is : 2400

$106 \times 106 - 94 \times 94$

$= 106^2 -94^2$ ........(i)

Apply Following Formula ( $a^2-b^2 =(a+b)(a-b)$ ) on (i)

$=(106+94)(106-94)$

$= (200)(12)$

= 2400

View Answer

Monday, December 17, 2018

The ratio of present ages of Mukesh and Suresh is 2 : 3.

December 17, 2018 |

General Aptitude, Problems on Ages, Ratio and Proportion, RRB TC CC Exam (Bangalore) 2007, Solved

The ratio of present ages of Mukesh and Suresh is 2 : 3. After 12 years, their ages will be in the ratio 11 : 15. The present age of Suresh will be-

A56 years

B32 years

C42 years

D48 years

Nithin K Nov 26 '2016 at 19:37

Answer is : 48 years

Explanation:

Let Mukesh's age = 2x or Suresh's age =3x

After 12 years,

$\frac{2x+12}{3x+12} = \frac{11}{15}$

$(2x+12) \times 15 = (3x+12) \times 11$

$30x +180 =33x +132$

48 = 3x

x = 16

$\therefore \text{ The present age of Suresh will be : }3x$

$= 3 \times 16$

$= 48 \text{ yr}$

View Answer

The ratio of the radii of two cylinders is 2 : 3 and the

December 17, 2018 |

General Aptitude, Ratio and Proportion, RRB TC CC Exam (Bangalore) 2007, Solved

The ratio of the radii of two cylinders is 2 : 3 and the ratio of their heights is 5 : 3. The ratio of their volumes will be-

A9 : 4

B4 : 9

C20 : 27

D27 : 20

Nithin K Nov 26 '2016 at 19:37

Answer is : 48 years

Explanation:

Let Mukesh's age = 2x or Suresh's age =3x

After 12 years,

$\frac{2x+12}{3x+12} = \frac{11}{15}$

$(2x+12) \times 15 = (3x+12) \times 11$

$30x +180 =33x +132$

48 = 3x

x = 16

$\therefore \text{ The present age of Suresh will be : }3x$

$= 3 \times 16$

$= 48 \text{ yr}$

View Answer

The difference between the compound interest and simple

December 17, 2018 |

Compound Interest, General Aptitude, RRB TC CC Exam (Bangalore) 2007, Simple Interest, Solved

The difference between the compound interest and simple interest on a certain sum for 2 years at the same rate of interest of 10% per annum is Rs. 42. The sum is-

ARs.4,200

BRs.42,000

CRs.420

DRs.4,500

padma Jan 2 '2019 at 21:31

Answer is : A [Rs.4,200]

Explanation:
Let the sum be Rs.x. then S.I.= $(\frac{x \times 10 \times 2}{100})$ = $\frac{2x}{10}$

C.I = $\big[x\big(1+ \frac{10}{100}\big)^2 -x\big]$ = $\frac{121x}{100}$

$\big[x \big(\frac{121}{100}\big)-x\big] =\frac{21x}{100}$

$=\frac{21x}{100}$

$\frac{21x}{100} - \frac{2x}{10} = 42$

=> $\frac{x}{100} = 42$

=> x = 4200

View Answer

A and B take part in a 100 m race. A runs at 5 km/h. If A

December 17, 2018 |

General Aptitude, RRB TC CC Exam (Bangalore) 2007, Solved, Time and Distance

A and B take part in a 100 m race. A runs at 5 km/h. If A starts after B runs 8 m,and wins the race by 8 seconds, the speed of B is

A4.15 km/ h

B4.14 km/ h

C4.25 km/ h

D4.41 km/ h

Nithin K Nov 26 '2016 at 19:24

Answer is : 4.14 km/ h

Explanation:

$\text{A's Speed = } \big(5 \times \frac{5}{18}\big)m/s$

$= 25 \text{ m/s}$

$\text{Time taken by A to cover 100 m = }100 \times \frac{18}{25} sec$

=72 sec

$\text{Time taken by B to cover 92 m = } 72+8$

=80 sec

$\therefore \text { B's Speed }= \big( \frac{92}{80} \times \frac{18}{5} \big) kmph$

=4.14 kmph

View Answer

The sides of a rectangle are 8 cm and 6 cm. The corners of

December 17, 2018 |

Area, General Aptitude, RRB TC CC Exam (Bangalore) 2007, Solved

The sides of a rectangle are 8 cm and 6 cm. The corners of the rectangle lie on a circle. Find the area of circle without the rectangle.

A30.6

B39

C42.4

D65.3

View Answer