Question

The cost of 1 books is Rs. 78 3/4. Find the cost of 12 books.​
please send the answer fast this chapter is rational numbers.

Answer 1

Step-by-step explanation:

$the \: cost \: of \: 1 \: book = 78 \frac{3}{4} \\ cost \: of \: 12 \: books = 78 \frac{3}{4} \times 12 \\ = \frac{315}{4} \times \frac{12}{1} = \frac{3}{315} \\ in \: its \: lowest \: term = \frac{3}{315} = \frac{1}{105} \\ = =105 \: is \: \: answer$

Answer 2

Rs 945

Step-by-step explanation:

Cost of one book = Rs 78 whole 3/4

Cost of 12 books =

$78 \frac{3}{4} \times \frac{12}{1}$

Convert into improper fraction

$\frac{315}{4} \times 12$

$= 945$

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