|| Question ||
If 12 chocolate bars cost Rs. 180, what would be the cost of 30 chocolate bars?
|| Answer ||
12 chocolate bars cost = Rs. 180
Cost of 30 chocolate bars = x

12:180 = 30:x
Means = Extremes
180 × 30 = 12 × x

( 3 × 4 = 12, 3 × 10 = 30)

( 4 × 45 = 180)



Therefore, 30 Chocolate Bars Costs Rs.450.