A complete work in 18 days and b in 30 days both started working and a quite after fews days ,after how many days a quite if work is complted in 20 days
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Answer:
4 days
Step-by-step explanation:
Rate of work by A = 1/18.
Rate of work by B = 1/30.
Let x be the days worked by A .
According to the question, we have that B works for all 20 days and A works only for 20 x days, thus
1/18 (20 - x ) + 1/30 * 20 = 1
(20-x)/18 = 1 - 2/3
20 - x = 18/3
20 - x = 6
x = 20 - 6 = 4 days.
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"The rate of A 1/18 job per day;
"The rate of B 1/30 job per day.
"Say they need 20 days to complete the project.
"According to the stem we have that B works for all t days and A works only for 20-t days, thus 1/18*(20-t) + 1/30 *20 = 1
"t = 14 days
"HOPE IT HELPS
"PLEASE MARK ME BRAINLIEST ☺️
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