The total cost of 6 books and 4 pencils is ₹34 and that of 5 books and 5 pencils is ₹30. The cost of each book and pencil (in₹) respectively is
(a) 1 and 5
(c) 6 and 1
(b) 5 and 1
(d) 1 and 6
(a) 1 and 5
(c) 6 and 1
(b) 5 and 1
(d) 1 and 6
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Answer:
b is the answer
Explanation:
Let the cost of one book be xrs One pencil be y rs According to que 6x+4y=34..1 5x+5y=30.. 2 By elimination method Multiply 1 with 5 and 2 with 6 30x+20y=170 30x+30y-180 (-) (-) -10y=-10 (-) Y=1 Since5x+5y=30 5x+5=30 5x=25 X=5 Hence cost of each book is 5 rs and each pencil is 1 rs