Question

The cost of 3 apples and 2 guavas is Rs 23.00 and that of 1 apple and 4 guavas of the same type is Rs 21.00. Then, what is the cost of 5 guavas?

Answer 1

let the cost of apples be x and cost of guavas be y
3x+2y=Rs.23.......(1)
1x+4y=Rs.21........(2)

Now,multiply 3 with (2)
3x+12y=21........(3)
Now subtract the (1) from(3)

we get,
8y=2
y=4

cost of 5 guavas=4×5=Rs.20