Answer:
B
Step-by-step explanation:
21b-32+7b-20b=? Tell fast pls
2 answers:
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Answer: B. 3.6
Step-by-step explanation:
Given : Time taken by one inlet pipe to empty of tank = 3 hours
⇒ Time taken by one inlet pipe to empty tank (entire) = 2 x 3 hours
= 6 hours →
Time taken by second inlet pipe to empty of tank = 6 hours
⇒ Time taken by second inlet pipe to empty tank (entire) =
= 9 hours →
If both pipes are pumping simultaneously at their respective constant rates to fill the empty tank to capacity.
Then time taken by them to fill the empty tank to capacity would be
Hence, it will take 3.6 hours to fill the empty tank to capacity .
Therefore , the correct answer is B. 3.6 .