The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is Rs. 4000. The total price of 12 chairs and 3 tables is:
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let the cost of cahir and table be x and y
10x = 4y
y = 5/2 x ____________1
15x + 2y = 4000
15x + 2×5/2x= 4000
20x = 4000
x = 200
from equ 1
y = 5/2 × 200
= 500
the cost of 12 chairs and 3 table
12x +13y
=Rs (2400+1500)
= Rs 3900
10x = 4y
y = 5/2 x ____________1
15x + 2y = 4000
15x + 2×5/2x= 4000
20x = 4000
x = 200
from equ 1
y = 5/2 × 200
= 500
the cost of 12 chairs and 3 table
12x +13y
=Rs (2400+1500)
= Rs 3900
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