(a) You have completed the mathematics project in 20 days. How many days will your friend take to complete the same work if he is 20% less efficient than you?
(b) Both of you can together finish the maths project in 16 days. After working together for 8 days, your friend left. The remaining part of the project was finished by you in 10 days. In how many days you alone can finish the project?
Answers
Answer:
A can complete the work in 30 days, thus in one day A can do = 1/30th part of work
B can do this work in 20 days, thus in one day B can do =1/20th part of work
Both A and B work together then they can do part of work
1/30 + 1/20
(2 + 3)/60
= 5/60 part of work
Or 1/12 part of work
If they work together then they can complete the work early. Let they take x days to complete the entire work
1/12 × x days = 1
x/12 = 1
Cross multiplication
x = 1 × 12
x = 12 days
It suggest, that if both A and B work together then they can complete the entire work in 12 days.
Answer: if both A and B work together then they can complete the entire work in 12 days
Answer:
24 days.
Step-by-step explanation:
as my friend is 20% less efficient than me,
therefore, 20% of20 =20/100*20
= 4.
therefore, no.of days friend took to complete the project= (20+4)days
=24 days (ans).