The correct answer is:
[A]: "

" .
______________________________________________________<u>Note</u>: "3/4" = "6/8" = "15/20" .
______________________________________________________
Answer:
3 3/7 or 24/7 mins
Step-by-step explanation:
Let total job = X
Jeff's rate = X/6
Bob's rate = X/8
Combined rate = X/6 + X/8
(4X × 3X)/24 = 7X/24
7X/24 = X/T
T = X ÷ (7X/24)
T = X × (24/7X)
T = 24/7 mins
Shortcut:
T = product of individual times/sum of individual times
T = (6×8)/(6+8)
T = 48/14
T = 24/7
T = 3 3/7 mins
Answer:
10
Step-by-step explanation:
Answer:
3
days
Step-by-step explanation:
Let the amount of work be x.
Daniel:
10 days = x
1 day =
x
Father:
6 days = x
1 day =
x
Together:
1 day =
x +
x
=
x +
x
=
x
=
x
No. of days =
x ÷
x
=
x ×
x
=
= 3