Question

6 people can paint 4 walls in 43 minutes.

How many minutes will it take for 7 people to paint 7 walls? Round to the nearest minute.

Answer 1

7 ppl can paint 7 walls in 43*4*6/49=35 min

Answer 2

could you show the solution?
I already have the answer :)

Answer 3

can anyone explain it to me clearly?

Answer 4

@vamgadu your answer is wrong

Answer 5

hey 1 person to paint one wall takes 43*6*4 mins
so 7persons to paint 7 walls take 43*6*4/49 mins
remember number of people and amount of work is inversely prop to time.

Answer 6

the answer should be 65

Answer 7

oh wait
i am wrong

Answer 8

ok so 6 people can paint 4 walls in 43 minutes.

this means that 6 people can paint 1 wall in (43/4) minutes

this would be 6 times faster than 1 person painting 1 wall, so we multiply by 6
one person painting one wall:

6*(43/4)

now we need to divide this by seven, as seven people will be seven times as fast:

(6*(43/4) )/7

now we multiply by seven because we're painting 7 walls:

6*(43/4) =64.5

65 to the nearest minute

Answer 9

eigenschmeigen is correct

Answer 10

It still confuses me a little bit :)

Answer 11

where do you get confused? which bit starts to confuse you? i'll try and explain more

Answer 12

why is it that 6 people can paint 1 wall in (43/4) minutes?

Answer 13

First understand that the problem presented means that it takes 6*43=258 minutes
of man-work to paint 4 walls
Which means that it takes 258/4=64.5 minutes of man-work to paint each wall.
Therefore, it takes 64.5*7=451.5 of man-work to paint 7 walls.
Finally we derive the answer to the problem as so: it takes 451.5/7=64.5 minutes for 7 people to paint 7 walls.

i asked it on this site.

http://www.algebra.com/tutors/students/your-answer.mpl?question=607974

it helps when open study is going slow. Hope it helped!