Question

the cost of 6 books is 420 rupees find the cost of 7 books ​

Answer 1

• COST OF 6 BOOKS = 420 RUPEES
• COST OF 1 BOOK = DIVIDE 420 BY 6 =

$6 |420| 70 \\ 42 \: \: \: \\ - - - - \\ 00 \: \: \: \\ - \: \: \: \: \: \: 0 \\ - - - - - \\ 000$

• SO COST OF 1 BOOK = 70 RUPEES
• COST OF 7 BOOKS = 70 × 7
• $\: \: \: 70 \\ \times 7 \\ - - - \\ 490$
• SO COST OF 7 BOOKS = 490 RUPEES

Answer 2

Answer:

Cost of 7 books is 490 rupees.

Step-by-step explanation:

$Question$

the cost of 6 books is 420 rupees find the cost of 7 books.

$ANSWER:-$

First we need to find the cost of 1 book

1 book cost = ⁴²⁰/6

» 70 rupees per book

Hence,the cost of 7 books = 70 x 7

» 490 rupees