arithmetic - a group of 55 boys and 70 girls go for trekking if there is meal for either 70 boys or 90 girls and if 28 boys have their meal find the total number of girls that can be catered with the remaining food - skillgun

As there is meal for 70 boys and 28 have their meal, the meal left can be catered to 42 boys.
Now, 70 boys = 90 girls
7 boys = 9 girls
Therefore, 42 boys = 54 girls
Hence, the meal can be catered to 54 girls.