how many days to cut grass for an area ?

[btimofte100]

Dear all i have the next problem which is in Romanian , and the answer should be 5 days and i get 5 square meters / square hours
This doesnt make sense Can you please help how to get 5 days and cancel the units ?

The problem text is

"To cut grass on a rectangular surface with size length = 250 m and width = 1.2 Hectometers , 5 workers have worked 3 days with 10 hours per day . In how many days same workers will cut the grass on an square area which side is 0.8 of the length of the rectangle and taking into account they work only 8 hours per day"

My solution give a correct 5 but the units are messed up ( should be 5 days )

 

[Deleted member 4993]

Dear all i have the next problem which is in Romanian , and the answer should be 5 days and i get 5 square meters / square hours
This doesnt make sense Can you please help how to get 5 days and cancel the units ?

The problem text is

"To cut grass on a rectangular surface with size length = 250 m and width = 1.2 Hectometers , 5 workers have worked 3 days with 10 hours per day . In how many days same workers will cut the grass on an square area which side is 0.8 of the length of the rectangle and taking into account they work only 8 hours per day"

My solution give a correct 5 but the units are messed up ( should be 5 days )
View attachment 23911

Width of the old rectangle = 1.2 hectometer = 120 meters

Area of the old rectangle = 120 * 250 sq.meters =30 000 sq.m

Time taken to mow old rectangle = 3*10 = 30 hours

Width of the new square = 250.*0.8 = 200 meters .......................[edited]

Area of the new square = 200 * 200 sq.meters =40 000 sq.m .......................[edited]

Time taken to mow new square = (40000)/(30000) * 30 hours = ? .......................[edited]

Working 8 hrs/day - how many days is that?

 

[btimofte100]

Width of the old rectangle = 1.2 hectometer = 120 meters

Area of the old rectangle = 120 * 250 sq.meters =30 000 sq.m

Time taken to mow old rectangle = 3*10 = 30 hours

Width of the new rectangle = 250.*0.8 = 200 meters

Area of the old rectangle = 200 * 200 sq.meters =40 000 sq.m

Time taken to mow new rectangle = (40000)/(30000) * 30 hours = ?

Working 8 hrs/day - how many days is that?

Why do you use "old rectangle" text 2 times with different values ?

 

[Deleted member 4993]

Why do you use "old rectangle" text 2 times with different values ?

That was a mistake - finger ran faster than brain! I have edited the post now.

 

[Steven G]

That was a mistake - finger ran faster than brain! I have edited the post now.

Corner time sir Super.

 

[btimofte100]

Width of the old rectangle = 1.2 hectometer = 120 meters

Area of the old rectangle = 120 * 250 sq.meters =30 000 sq.m

Time taken to mow old rectangle = 3*10 = 30 hours

Width of the new square = 250.*0.8 = 200 meters .......................[edited]

Area of the new square = 200 * 200 sq.meters =40 000 sq.m .......................[edited]

Time taken to mow new square = (40000)/(30000) * 30 hours = ? .......................[edited]

Working 8 hrs/day - how many days is that?

I finally solved it . Nice job everyone|

 

[btimofte100]

Why do you use "old rectangle" text 2 times with different values ?

Time taken to mow new rectangle = (40000)/(30000) * 30 hours = ?

I dont get this part . Why do you multiply by 30 hrs which is the old time in hours ?. We need to use the new time 8*x where x is nr of days ?

 

[btimofte100]

Width of the old rectangle = 1.2 hectometer = 120 meters

Area of the old rectangle = 120 * 250 sq.meters =30 000 sq.m

Time taken to mow old rectangle = 3*10 = 30 hours

Width of the new square = 250.*0.8 = 200 meters .......................[edited]

Area of the new square = 200 * 200 sq.meters =40 000 sq.m .......................[edited]

Time taken to mow new square = (40000)/(30000) * 30 hours = ? .......................[edited]

Working 8 hrs/day - how many days is that?

Wrong quote




Time taken to mow new rectangle = (40000)/(30000) * 30 hours = ?

I dont get this part . Why do you multiply by 30 hrs which is the old time in hours ?. We need to use the new time 8*x where x is nr of days ?