Deepak bought 3 note book and 2 pen for Rs 80. His friend Ram said that price of each note book could be Rs 25 Then three note book would cost Rs 75, the two pens would cost Rs 5 and each pen could be for Rs 2.50. (ii) Which of the solution satisfying equation
Answers
Step-by-step explanation:
Deepak bought 3 notebooks and 2 pens for Rs. 80. His friend Ram said that price of each notebook could be Rs. 25. Then three notebooks would cost Rs.75, the two pens would cost Rs.5 and each pen could be for Rs. 2.50. Another friend Ajay felt that Rs2.50 for one pen was too little. It should be at least Rs. 16. Then the price of each notebook would also be Rs.16. Lohith also bought the same types of notebooks and pens as Aditya. He paid 110 for 4 notebooks and 3 pens. Later, Deepak guess the cost of one pen is Rs. 10 and Lohith guess the cost of one notebook is Rs. 30.
(i)Form the pair of linear equations in two variables from this situation by taking cost of one notebook as Rs. x and cost of one pen as Rs. y.
(a) 3x + 2y = 80 and 4x + 3y = 110
(b) 2x + 3y = 80 and 3x + 4y = 110
(c) x + y = 80 and x + y = 11
(d) 3x + 2y = 110 and 4x + 3y = 80
(ii) Find the cost of one notebook.
(a) Rs. 20 (b) Rs. 10 (c) Rs. 5 (d) Rs. 15
(iii) Find the cost of one pen.
(a)Rs. 20 (b) Rs. 10 (c) Rs. 5 (d) Rs. 15
(iv) Find the total cost if they will purchase the same type of 15 notebooks and 12 pens. (a) Rs. 400 (b) Rs. 350 (c) Rs. 450 (d) Rs. 420
(v) Find whose estimation is correct in the given statement.
(a) Deepak (b) Lohith (c) Ram (d) Ajay