Question

3 pens, 5 pencils and 7 erasers cost Rs. 80 while 5 pens ,8 pencils and 12 eraser cost Rs. 120 . find the cost (in Rs.) of 3 pen, 6 pencils and 6 erasers ?

Answer 1

Answer:

Rs 120

Explanation:

5 pens+ 8 pencils+12 erasers=Rs 120

3 pens+5 pencils+7 erasers= Rs 80

∴2 pen+3 pencils+5 erasers=Rs 40

and

   ⇒1 pen+ 2 pencils+2 erasers=Rs 40   ··········⁽¹⁾ * 3

⇒   3 pens +6 pencils +6 erasers= 120