The given details are,
In 3 hours, 9 Girls can prepare = 135 garlands
In 1 hour, 9 girls can prepare = 135/3 = 45 garlands
In 1 hour, 1 girl can prepare = 45/9 = 5 garlands
∴ In 1 hour, Number of girls required to prepare 270 garlands = 270/5 = 54 girls
