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If 20 percent of x is 5y, and y = 7, what is 60 percent of x?

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If 20 percent of x is 5y, and y = 7, what is 60 percent of x?  [#permalink]

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New post 27 Jun 2018, 21:34
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

92% (00:38) correct 8% (00:48) wrong based on 52 sessions

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Re: If 20 percent of x is 5y, and y = 7, what is 60 percent of x?  [#permalink]

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New post 27 Jun 2018, 22:47

Solution



Given:
    • 20% of x = 5y
    • y = 7

To find:
    • The value of 60% of x = \(\frac{60}{100} * x = \frac{3x}{5}\)

Approach and Working:
As y = 7, 5y = 5 * 7 = 35

So, we can write:
    • 20% of x = 35
    Or, \(\frac{x}{5} = 35\)
    Or, \(\frac{3x}{5} = 35 * 3 = 105\)

Hence, the correct answer is option A.

Answer: A
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Re: If 20 percent of x is 5y, and y = 7, what is 60 percent of x?  [#permalink]

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New post 28 Jun 2018, 03:03
Bunuel wrote:
If 20 percent of x is 5y, and y = 7, what is 60 percent of x?

A. 105
B. 115
C. 125
D. 145
E. 175



20% of x = 5y
20/100 of x = 35................................y=7
(1/5)x = 35
x = 35*5

we are asked to find out 60% of x.

(35*5)*60/100
=105

Thus the best answer is A.

Short-cut:

(35/20)*60
=105
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Re: If 20 percent of x is 5y, and y = 7, what is 60 percent of x?  [#permalink]

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New post 28 Jun 2018, 03:27
answer is 105

x=25y=175

60% of 175 is 105
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Re: If 20 percent of x is 5y, and y = 7, what is 60 percent of x?  [#permalink]

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New post 02 Jul 2018, 09:46
Bunuel wrote:
If 20 percent of x is 5y, and y = 7, what is 60 percent of x?

A. 105
B. 115
C. 125
D. 145
E. 175


Since 20 percent of x is 5y and y = 7, we have:

0.2x = 5(7)

0.2x = 35

x = 175

So 60% of 175 is 0.6 x 175 = 105.

Answer: A
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Re: If 20 percent of x is 5y, and y = 7, what is 60 percent of x?  [#permalink]

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New post 02 Jul 2018, 11:47
Bunuel wrote:
If 20 percent of x is 5y, and y = 7, what is 60 percent of x?

A. 105
B. 115
C. 125
D. 145
E. 175


\(20\) % = \(\frac{1}{5}\)

So, \(\frac{x}{5} = 5*7\)

Or, \(x = 25*7\)

So, 60 % of x = 105, Answer must be (A)
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Re: If 20 percent of x is 5y, and y = 7, what is 60 percent of x? &nbs [#permalink] 02 Jul 2018, 11:47
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