Question

total cost of 15 newspaper is rupees 37 point 50 find the cost of 25 newspaper

Answer 1

$cost \: of \: 15 \: newspaper = 37 \\ \\ cost \: of \: 1 \: newspaper \: = \frac{37}{15} \\ \\ cost \: of \: 25 \: newspaper \: = \frac{37}{15} \times 25 \\ = rupees \: 61.66$

Answer 2

15 newspapers=rupees 37.50
1 newspaper=37.50/15
=rupees2.50
25 newspapers
=1 newspaper×25newspapers
=2.50×25=rupees62.50