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# Helpers are needed to prepare for the fete. Each helper can make either 2 large cakes or 35 small cakes per hour. The kitchen is available for 3 hours and 20 large cakes and 700 small cakes are needed. How many helpers are required?

 A) 10 B) 15 C) 20 D) 25

Answer:   A) 10

Explanation:

20 large cakes will require the equivalent of 10 helpers working for one hour. 700 small cakes will require the equivalent of 20 helpers working for one hour. This means if only one hour were available we would need 30 helpers. But since three hours are available we can use 10 helpers.

Subject: Percentage - Quantitative Aptitude - Arithmetic Ability
Exam Prep: GRE

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• Related Questions

The ratio of earnings of A and B is 4:5. If the earnings of A increase by 20% and the earnings of B decrease by 20%, the new ratio of their earnings becomes 6:5. What are A's earnings?

 A) Rs.22,000 B) Rs.27,500 C) Rs. 26,400 D) Cannot be determined

Answer & Explanation Answer: D) Cannot be determined

Explanation:
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Subject: Percentage - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
Job Role: Bank PO

52

If the length of a rectangle is increased by 10% and the area is unchanged , then its corresponding breadth must be decreased by?

Answer

Suppose length = 100m and breadth = x m

Area = 100 m

New length = 110m and breadth = (x-y% of x)

Then, $\inline&space;110\times&space;(x-\frac{y}{100}x)=100\times&space;x$

$\inline&space;\Rightarrow$ $\inline&space;110\times&space;(1-\frac{y}{100})=100$

$\inline&space;\Rightarrow$ $\inline&space;1-\frac{y}{100}=\frac{100}{110}$

$\inline&space;\Rightarrow&space;\frac{y}{100}=1-\frac{100}{110}=\frac{1}{11}$

$\inline&space;y=\frac{100}{11}=9\frac{1}{10}$%

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Subject: Percentage - Quantitative Aptitude - Arithmetic Ability

43

The tax on an article decreases by 10% and its consumption increases by 10%. Find the effect percent on its revenue?

Answer

10 - 10 - $\inline&space;\frac{10\times&space;10}{100}=&space;-1%$ %

$\inline&space;\therefore$ Decrease in revenue = 1%

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Subject: Percentage - Quantitative Aptitude - Arithmetic Ability

8

From a salary of an officer, 10% is deducted as house rent, 15% of the rest he spend on children's education and 10% of the balance he spends on clothes. Then, he is left with Rs. 4131. Find his total salary?

Answer

Suppose his total salary be Rs.x, then

90% of 85% of 90% of x = 4131

$\inline&space;\Rightarrow&space;\frac{90}{100}\times&space;\frac{85}{100}\times&space;\frac{90}{100}\times&space;x=4131$

$\inline&space;\therefore&space;x=\frac{4131\times&space;100\times&space;100\times&space;100}{90\times&space;85\times&space;90}=6000$

Hence , the salary of the officer is Rs.6000

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Subject: Percentage - Quantitative Aptitude - Arithmetic Ability

12

In an election, there were two candidates only. The candidate who got 62% of the total votes polled and was elected by a majority of 192 votes. The total number of votes polled was?

Answer

Suppose total votes polled is x

$\inline&space;\Rightarrow$ $\inline&space;\frac{62x}{100}=\frac{38x}{100}+192$

$\inline&space;\Rightarrow&space;\frac{62x}{100}-\frac{38x}{100}=192$

$\inline&space;\Rightarrow&space;\frac{24x}{100}=192\Rightarrow&space;x=800$

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Subject: Percentage - Quantitative Aptitude - Arithmetic Ability

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