Q1.57 कुर्सियों तथा मेजों का मूल्य 6000 रु. है, यदि एक कुर्सी
का मूल्य 90 रु. और 1 मेज का मूल्य 120 रु. हो, तो
कुर्सियों की संख्या कितनी है?
Answers
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Step-by-step explanation:
SOLUTION
GIVEN
- The cost of 57 chairs and tables is Rs.6000.
- The cost of 1 chair is Rs.90
- The cost of 1 table is Rs.120
TO DETERMINE
The number of chairs
EVALUATION
Let
Number of chair = x and number of chair = y
It is given that total number of chair and table = 57
Thus we get
x + y = 57 - - - - - - (1)
Again the cost of 1 chair is Rs. 90 and the cost of 1 table is Rs. 120
So by the given condition
90x + 120y = 6000
⇒ 3x + 4y = 200 - - - - - (2)
From Equation 1 we get
y = 57 - x
From Equation 2 we get
3x + 4( 57 - x ) = 200
⇒ 3x + 228 - 4x = 200
⇒ x = 28
From Equation 1 we get
y = 57 - 28 = 29
FINAL ANSWER
The number of chairs = 28
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