Question

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Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

No.of oil tankers given are 6

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

time taken to fill 6 oil tankers by a pipe

=4 1/2=9/2 hours

Time taken by a pipe to fill one tanker

=(9/2)/6

=>9/(2×6)

=>3/4 hours

a) Time take by a pipe to fill 4 tankers

=4×(3/4)

= (4×3)/4

=>3 hours

b) in 3/4 hours a pipe can fill 1 tanker

no.of oil tankers can be filled by a pipe in 12 hours = 12/(3/4)

=>(12×4)/3

=>4×4

=16

No. of oil tankers =16