Question

A stationery store sells 12 books for 408. What is
the cost of 25 such books?​

Answer 1

Answer:

Step-by-step explanation:

Cost of 12 books = 408/-

cost of 25 books = ?

Cost of 1 book = ?

⇒ 12 = 408

⇒ 1 = x ( cross multiplication )

⇒ 12x = 408

⇒ x = 34/-

now ,

Cost of 25 books = 34 × 25

⇒ 850/-

∴ Cost of 25 books = 850rs