120 copies of a book cost Rs. 6000. What will be 400 copies cost?
120 copies of a book cost Rs. 6000. What will be 400 copies cost?
Explanation
Cost of 120 copies = Rs. 6000
Cost of 1 copy = Rs. 6000 / 120
= Rs. 50
Cost of 400 copies = Rs. 50 × 400
= Rs. 20000