Question

The cost of 10 books and a pen is Rs840. If the cost of a pen is Rs40, find the cost of a book

Answer 1

Answer:

Cost of 10 books+pens= Rs. 840

Cost of 10 books= 840-40= Rs. 800

Cost of one book =800÷10= Rs. 80 each.

Answer 2

Answer:

$\huge{\purple{❥}\pink{a}\orange{n}\blue{s}\red{w}\green{e}\purple{r}}$

$cost \: of \: 10 \: books \: and \: a \: pen \: = 840 \\ cost \: of \:a\: pen = 40 \\ so \: cost \: of \: 10 \: books = 840 - 40 \\ cost \: of \: ten \: books = 800 \\ cost \: of \: a \: book = 800 \div 10 \\ cost \: of \: a \: book = 80rupees$

hope this helps.!!