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What is the area of shaded region in the figure shown?

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What is the area of shaded region in the figure shown? [#permalink]

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New post 26 Mar 2017, 23:11
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Question Stats:

71% (01:54) correct 29% (01:46) wrong based on 121 sessions

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What is the area of shaded region in the figure shown?

A. 4/3
B. 8/3
C. 4
D. 8
E. 12
[Reveal] Spoiler: OA

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Last edited by hazelnut on 27 Mar 2017, 00:01, edited 1 time in total.

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Re: What is the area of shaded region in the figure shown? [#permalink]

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New post 26 Mar 2017, 23:55
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Slope= (1-0)/(0-(-8/3))= 1/(8/3)= 3/8
we know, Y= mx+b
1= (3/8)*0 + b
then b=1
so, 4= (3/8)*x + 1
(3/8)*x= 3
x= 8

So the area of the shaded region is (1/2)* (4-1)* 8
=12

I find 12, given answer is 8. Can anybody show my mistake...?
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Re: What is the area of shaded region in the figure shown? [#permalink]

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New post 27 Mar 2017, 00:01
nahid78 wrote:
Slope= (1-0)/(0-(-8/3))= 1/(8/3)= 3/8
we know, Y= mx+b
1= (3/8)*0 + b
then b=1
so, 4= (3/8)*x + 1
(3/8)*x= 3
x= 8

So the area of the shaded region is (1/2)* (4-1)* 8
=12

I find 12, given answer is 8. Can anybody show my mistake...?


Sorry. I have edited the answer. The official answer is E. 12.
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"Be challenged at EVERY MOMENT."

“Strength doesn’t come from what you can do. It comes from overcoming the things you once thought you couldn’t.”

"Each stage of the journey is crucial to attaining new heights of knowledge."

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Re: What is the area of shaded region in the figure shown? [#permalink]

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New post 06 Sep 2017, 23:09
hazelnut wrote:
What is the area of shaded region in the figure shown?

A. 4/3
B. 8/3
C. 4
D. 8
E. 12


From the co-ordinates given we have to find the value of x-cordinate when y=4.
Area of the shaded region = Area of the triangle.

Form eqn of line using the slope m =1-0/0--8/3= 3/8
y = 3/8x+b.
When x = 0 ; y =1; therefor b= 1;
so y= 3/8 x+1;
when y= 4; x= 3*8/3= 8;

Triangle 's area is 1/2*(4-1)*8= 3*4= 12.

Ans:E

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Re: What is the area of shaded region in the figure shown?   [#permalink] 06 Sep 2017, 23:09
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