3 men at 7 hours per day complete flooring of 84 m in 2 days. how many men can floor 256 m in 4 days working 8 hours

9514 1404 393

  4 men

Step-by-step explanation:

We presume the effort per "m" remains the same.

First project has effort/m of ...

  (3 men)(7 h/day)(2 day)/(84 m) = (42/84) man·day/m = 1/2 man·day/m

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Then the number of men required for the second project is ...

  (1/2) man·day/m × (256 m)/(8 h/day × 4 day) = (1·256)/(2·8·4) man = 4 man

It will take 4 men to complete the project in the given time.

the dimensions are:

step-by-step explanation:

we want to find the dimensions of a rectangular box with volume of

we factor to obtain;

we rewrite the rightmost factor to obtain;

recall that:

we apply difference of two squares formula to obtain;

hence the dimensions are

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500