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- Question
A duster is of dimension 5x5x7 all in cms, is sinked into a cylindrical vessel of radius 5 cm and height 10 cm. After insertion the level of the water is inccresed by 2.14 cm. Then by what percentage the part of the duster is above the layer ?
Options- A. 96 %
- B. 4 %
- C. 97 %
- D. 3 %
- Correct Answer
- 4 %
ExplanationImension of the duster is assumed as 5x5x7 cm3
Volume of the duster below the water layer
= volume of water increased
= ?xrxrxh = 3.14×52×2.14 ? 168 cm3Total volume of the duster = 5×5×7 = 175 cm3
Percentage of the duster part below the layer = 168×100/175 = 96%
Percentage of the duster part above the layer = 4%
- 1. The marked price of a Watch is Rs.8400. It is to be sold at Rs.6896 at two successive discounts. If the first discount is 12%, the second discount is ?
Options- A. 7.2 %
- B. 9.14 %
- C. 7.13 %
- D. 6.709 % Discuss
- 2. Last year vivek saved 10% of his annual earnings, this year he earned 5% more than last year and he saved 12% of his annual earnings. The amount saved this year was what percentage of the amount saved last year ?
Options- A. 87%
- B. 98%
- C. 138%
- D. 126% Discuss
- 3. Twelve percent of Kalyan's monthly salary is equal to the sixteen per cent of Nandu's monthly salary. Sarnesh's monthly salary is half that of Nandu's monthly salary. If sarnesh's annual salary is Rs. 1.08 lacs, What is Kalyan's monthly salary ?
Options- A. 15,000
- B. 36,000
- C. 24,000
- D. 12,500 Discuss
- 4. In measuring the sides of a rectangle, one side is taken 20% in excess and the other 10% in deficit. Find the error per cent in area calculated from the measurement ?
Options- A. 8% excess
- B. 9% deficit
- C. 12% excess
- D. 11% deficit Discuss
- 5. The price of pulses has increased by 25%. The percentage of reduction that a family should effect in the use of pulses so as not to increase the expenditure on this account is ?
Options- A. 16%
- B. 20%
- C. 84%
- D. 72% Discuss
- 6. 5% people of a village in India died by dengue, 15% of the remainder left the village on account of fear. If now the population is reduced to 3553, how much was it in the beginning ?
Options- A. 4400
- B. 3100
- C. 2800
- D. 5600 Discuss
- 7. In a school of 1500 boys, 35% are Hindu, 30% are Sikh,15% are Muslims and remainning are Christians. Find number of christian boys in the school ?
Options- A. 250
- B. 200
- C. 300
- D. 350 Discuss
- 8. 21% of 500 + 31% of 1100 - 30% of 790 = ?
Options- A. 209
- B. 290
- C. 309
- D. 390 Discuss
- 9. Sairam spent Rs. 38460 on the renovation of his home and Rs. 24468 on buying TV set and remained with 28% of the total amount. What was the total amount?
Options- A. Rs. 87400
- B. Rs. 68700
- C. Rs. 74000
- D. Rs. 94060 Discuss
- 10. 63.5% of 8924.2 +? % of 5324.4 = 6827.5862
Options- A. 28
- B. 22
- C. 18
- D. 12 Discuss
Percentage problems
Search Results
Correct Answer: 6.709 %
Explanation:
(100-x)% of 88% of 8400 = 6896
=>
=> x = 6.709%
Correct Answer: 126%
Explanation:
Suppose total earnings = Rs. 10000
10% saving = 10000 x (10/100) = Rs. 1000
This year 5% more income than prev year = Rs. 10500
12% saving = 10500 x (12/100) = Rs. 1260
Percentage of amount saved = (1260/1000) x 100 = 126%
Correct Answer: 24,000
Explanation:
Let K = Kalyan's monthly salary
N = Nandu's monthly salary
S = Sarnesh's monthly salary.
Then from given data,
12% of K = 16% of N
S = N/2 => N = 2S
K = 16/12 x N = 16/12 x 2S
= 16/6 x 1.08/12 = 16/6 x 0.09 = 0.24 lacs = 24,000
Correct Answer: 8% excess
Explanation:
Since Area of Rectangle = side1 x side2
Therefore, error% in area
=
%
= [20 - 10 + ( -10 x 20)/100]% or 8%
i.e. 8% excess.
Correct Answer: 20%
Explanation:
Reduction in consumption
=
X 100%
=
X 100%
= 20%
Correct Answer: 4400
Explanation:
Let 'P' be the original population at the beginning
P x (95/100) x (85/100) = 3553
P = 4400.
Correct Answer: 300
Explanation:
In that 35% are Hindu, 30% are Sikh, 15% are Muslims
=> 35 + 30 + 15 = 80%
Remaining Boys = 100% - 80% = 20% of 1500
=> 20 x 1500/100 = 300 boys are Christians.
Correct Answer: 209
Explanation:
Given 21% of 500 + 31% of 1100 - 30% of 790 = ?
? = 21 x 5 + 31 x 11 - 3 x 79
? = 105 + 341 - 237
? = 446 - 237
? = 209.
Correct Answer: Rs. 87400
Explanation:
Let the total amount he had with = Rs. p
From the given data,
p - 38460 - 24468 = 28p/100
p - 28p/100 = 24468 + 38460
72p/100 = 62928
72p = 62928 x 100
p = 62928 x 100/72
p = 87400
Hence, the total amount he had = p = Rs. 87400.
Correct Answer: 22
Explanation:
63.5% of 8924.2 +? % of 5324.4 = 6827.5862
=> 63.5% of 8925 + ? % of 5325 = 6830
=> 6830 ~= 5320 + ?(5325)/100
=> ? ~= 22
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