Question

at a camp, there is enough food for 156 scouts for 15 days.For how many days the food will last 39 more scouts are added

Answer 1

No.of scouts = 156
No. of days food lasts = 15 days
No. Scouts added =39
Total no of scouts =
$156 + 39 = 195$
No. of days food will last now =
$156 \times 15 = 2340 \\ 2340 \div 195 = 12 \: days$
HOPE HELPS :D