Question

please give me correct answer I give like for correct answer

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Answer 1

Step-by-step explanation:

According to the question,

6 oil tankers can be filled by a pipe =4 1,/2

= 9/2 hours

1 oil tanker can be filled by a pipe = 9/(2×6) hours

4 oil tankers can be filled by a pipe= 9/(2 ×6) ×4

= 9/6×2

= 18/6

. =3 hours