Question

cost of 10 kg rice is 100 rupees what cost of 8 kg rice

Answer 1

cost of 10kg rice=100
cost of 1 kg rice=100/10=10
cost of 8 kg rice=10×8=80

Answer 2

10kg rice =100 rupees
So 1 kg rice =100/10
Therefore 8kg of rice =100/10*8=80 rupees hope it's helpful