the cost of a register is Rs 30 more than the cost of a notebook. if the cost of three notebooks and two registers is Rs. 135 , find the cost of one register and one notebook.
Answers
Let the cost of one notebook be x
Therefore, cost of one register = x+30
Cost of 3 notebooks =3x
Cost of 2 registers =2(x+30)
=2x+60
Total cost of 3 notebooks and 2 registers =5x+60
B.T.P 5x+60=135
5x=75
x=15
Therefore, the cost of one notebook is 15 and one register is 45(15+30).
HOPEFULLY THIS HELPS MATE....
Cost of 1 register = ₹45
Cost of 1 notebook = ₹15
Step-by-step explanation:
Let the cost of 1 notebook be ₹x
therefore, cost of 1 register = ₹x + 30
According to question;
(3 × ₹x) + {2 × (₹x+30)} = ₹135
=> ₹3x + ₹2x + 60 = ₹135
=> ₹5x = ₹135 - 60
=> ₹5x = ₹75
=> ₹x = ₹75/5 = ₹15
Therefore, cost of 1 nbk = ₹x = ₹15
And, Cost of 1 register = ₹(x+30)
= ₹(15+30)
= ₹45.
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