Answer:
4 hrs
Step-by-step explanation:
1 foot = 12 inches
The rungs are 1 ft apart, so it means yung 3rd rung is 2 ft from the surface of water kasi yung first rung is nasa tubig na...
6 inches per hour- 2 hours ang kailangan para umabot sa 2nd rung( since 1 ft= 12 inches)...another 2 hours para umabot sa 3rd rung
2 hrs + 2 hrs= 4 hrs