sibr4566
14.11.2019 •
Mathematics
It takes kelby 10 hours per week to prepare food. nat can do the same job in 15 hours. how long would it take kelby and nat to prepare the food working together?
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Ответ:
12hours and 30minutes
Step-by-step explanation:
Food Preparae Time by Kelby =10hrs
Nat =15hrs
Kelby + Nat = ?
let Kelby + Nat be X
Kelby + Nat = 2X(because of two person)
10+15=2X
25=2X
X =12.5hrs
X=12hrs and 30mins
It takes 12hours and 30minutues for Kelby and Nat to prepre the food work together.
Ответ: