Question

If 5 books cost Rs. 75, find the cost of 12 books of the same kind.​

Answer 1

$\huge{\underline{\sf{\red{Answer}}}}$

$\huge \implies \small \sf \: cost \: of \: 5 \: books = 75 \: rs. \\ \huge \implies \small \sf \: \: cost \: of \: one \: book \: = \frac{cost \: of \: five \: books}{number \: of \: books} \\ \huge \implies \small \sf \: \cancel \frac{75}{5} = 15 \\ \\ \huge \implies \small \sf \: \: cost \: of \: 12 \: books \: = 12 \times cost \: of \: 1 \: book \\ \huge \implies \small \sf \: \: 12 \times 15 \\ \huge \implies \large \sf \:180 \: rs$

$\boxed{\boxed{\underline{\red{\bold{ = 180 rupees }}}}}$