Question

If 9 kgs of potatoes and 12 kgs of tomatoes cost rs 423 and the cost of 1 kg of potatoes is rs 8 what is the total cost of 4 kgs of potatoes and 6kgs of tomatoes ?

Answer 1

Let price of potato and tomato are X,Y respectively.

9X+12Y=423

ATQ

X=8

72+12Y=423

12Y=423-72

Y= 351/12

Y=29.25

So cost of 5

4 kg potato and 6kg tomato is

4X +6Y

=4×8 + 6×29.25

=32 +175.5

=207.5

207.5 rupees