Ryoichi Ryoichi
  • 22-10-2023
  • SAT
High School

A water tap fills a tank in 4 hours. At the bottom of the tank, there is a hole that empties the tank in 1 hour. If both the tap and the hole are open together, and the tank is fully filled, how long will it take for the tank to be completely empty?

A. 70 minutes
B. 80 minutes
C. 90 minutes
D. 100 minutes

Answer :

peskychild2308 peskychild2308
  • 02-09-2024

Answer:

90 mins i think. Sorry if wrong im not sure

Explanation:

Answer Link

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