Question

A can finish a work in 16 days and B
can finish the same work in 20 days.
After A had worked for 4 days, B also
joined with A to finish the remaining
work. In how many days will the
remaining work be finished?​

Answer 1

$\huge \underline \bold \red {Answer:}$

6.66 days

$\huge \underline \bold \red {Explanation:}$

Fraction of work done by A in 1day = 1/16

Fraction of work done by A in 4 days = 4/16 = 1/4

Fraction of work done by B in 1 day = 1/20

Fraction of work done by A & B in 1 day = ( 1/16) +(1/20 ) = (20+16)/320

= 36 /320 = 9/80

Work remaining = 1- (1/4 ) = 3/4

No.of days required to complete the work by A & B working together

= (3/4) /(9/80) = ( 3x80)/(4x9) = 240/36 = 60/9=6.66

A & B would require 6.66 more days to complete the remaining work .

Answer 2

Answer:

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