The cost of ten seats is the same as the cost of four tables. The total cost of 15 seats and 2 tables is Rs. 4000. The total cost of twelve seats and three tables is:
A. Rs. 3500
B. Rs. 3750
C. Rs. 3840
D. Rs. 3900
Answer:D
The cost of ten seats is the same as the cost of four tables. The total cost of 15 seats and 2 tables is Rs. 4000. The total cost of twelve seats and three tables is:
A. Rs. 3500 B. Rs. 3750 C. Rs. 3840 D. Rs. 3900
Explanation: Let's say the price of a chair is Rs. x and the price of a table is Rs. y.Then 10x = 4y or y = 5 x is the answer.4000 = 2 15x + 2y,4000 = 15x + 2 x 5/2 x,4000 x 20.x equals 200.As a result, y = 5/2 x 200 = 500.As a result, the price of 12 seats and 3 tables equals 12x + 3y = (2400 + 1500) rupees= 3900 rupees.