Question

Annmarie can plow a field in 240 minutes. Gladys can plow a field 80 minutes faster. If they work together, how many minutes does it take them to plow the field?

Answer 1

@amoodarya

Answer 2

\[\frac{ A }{ 240 }=\frac{ G }{240-80 }\\A=\frac{3}{4}G\]

Answer 3

so it would be 160?

Answer 4

you have to find A+G

Answer 5

how?

Answer 6

oh . sorry
i had a mistake

Answer 7

SO WHAT WE DO?

Answer 8

\[\frac{ a }{ 240 }=\frac{ g }{160 }\\\frac{ a }{ 24 }=\frac{ g }{16 }\\\frac{ a }{ 3 }=\frac{ g }{2 }\]

Answer 9

then?

Answer 10

I would use the idea of
rate * time = amount of work

rate is how much work you do per minute
for example A does 1 field/240 minutes
B goes 80 minutes faster so 1 field/160 minutes
you can add the rates
(1/240 + 1/160)* t = 1 field
add the two fractions, and then find t

Answer 11

\[\frac{ a }{ 3 }=\frac{ g }{ 2 }=\frac{ a+g }{x }\]
find x

Answer 12

"phi" said it very simpler ,and clear

Answer 13

96?

Answer 14

yes, 96 minutes

Answer 15

thank u guys