Question

16. The cost of 12 kg rice and 15 kg tea is Rs. 1944. If 25
tea and 10 kg rice together cost Rs. 3120, find the price of each
per kilogram​

Answer 1

Answer: cost of 1 kg of rice=rupees 12

Cost of 1 kg of tea is rupees 120

Step-by-step explanation:

Let the cost of 1 kg of rice be x and 1 kg of tea be y

12x+15y=1944

3(4x+5y)=1944

4x+5y=648... eqn 1

10x+25y=3120

5(2x+5y)=3120

2x+5y=624...eqn 2

-4x-5y=-648

-2x=-24

x=12

y=(624-2*12)/5

=624-24/5

=600/5

=120