4 inches falls in 2 hours,so 2 inches falls in 1 hour. 1 inch will fall in half and hour
After 6.5 hours will must first solve 6 hours. 6x2 is 12. .5x1
Add up 12+1. This means that 13 inches will fall in 6.5 hours.
Hope this helps-Nea ( if you want I take brainliest)