Question

A pen set having two pens costs amount 250.If it is known one pen cost 3/2 times that of the other,find the cost of each pen separately.​

Answer 1

Answer:

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Question

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The cost of 2 pens and one pencil is Rs. 35. The cost of 3 pens and 4 pencils is Rs. 65. What is the cost of one pen?

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Solution

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Correct option is C)

Solution:- (C) 15

Let the cost of pen and pencil be x and y

cost of 2 pens and one pencil is Rs. 35 (Given)

∴ 2x+y=35 ⟶eq

n

(i)

cost of 3 pens and 4 pencils is Rs. 65

∴ 3x+4y=65 ⟶eq

n

(ii)

Multiplying eq

n

(i) by 4, we get

8x+4y=140 ⟶eq

n

(iii)

Subtracting eq

n

(ii) from (iii), we have

8x+4y−3x−4y=140−65

⇒ 5x=75

⇒ x=15

Hence, the cost of 1 pen is Rs. 15.

Answer 2

Answer:

100, 150 Rs

Solution is in the attachment

Hope this helps you