Question

if cost of 400 grams of cake is Rd 80 find cost of 1.5kg of cake

Answer 1

cost of 1500 grams of cake = 80/400*1500
= 20*15 = 300

Answer 2

cost of 400 g= Rs 80
cost of 1 = 80 ÷400= 0.2 Rs
therefore cost of 1.5 kg = 1500g = 0.2×1500= rs 300