Question

the cost of 1kg us10what is cost of 800g

Answer 1

eight hundred 800g in 8

Answer 2

If 1 kg of something costs Rs 10
therefore, 1kg = 1000g
Rs 10 / 1000g= 0.01 rupees
1g of that thing costs 0.01 rupees means 1 paise.
800g ×1 paise= 800 paise
It means 800 g of that thing will cost Rs 8.