Question

if cost of 4000 bricks rs 2000 then the cost of 10000 bricks is?

Answer 1

the cost of 10000 bricks is 5000 rupees

Answer 2

Cost of 4000 bricks => 2000
Cost of 1 brick $\frac{2000}{4000}$
∴ 
Cost of one brick ₹1/2 
⇒ Cost for 10000 bricks 
⇒10000 × $\frac{1}{2}$
⇒ ₹5000