Question

Anand earns rs 80 in 7 hours.ram earns rs 90 in 12 hours.the ratio of their earnings is

Answer 1

$ananda \: earn \: rs \: 80 \: in \: 7 \: hours \\ so \: he \: earn \: in \: one \: hour \: = \frac{80}{7} \\ \\ ram \: earn \: \: rs \: 90 \: in \: 12 \: hours \\ so \: he \: earn \: in \: one \: hours \: = \frac{90}{12} \\ so \: ratio \: of \: their \: earning \\ = \frac{80}{7} \div \frac{90}{12} \\ \\ = \frac{80}{7} \times \frac{12}{90} \\ \\ = \frac{32}{21}$
=32:21
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