Question

it takes sami 10 minute to shovel the snow 20 m2 area. he charges 5 dollars for half an hour . how much will he charge to shovel the snow of a sidewalk that has a dimensions of 2m x 40m.

Answer 1

First, we need to find the area of the sidewalk that he will be shoveling:
$A=l*w$

In this case, l=2m and w=40m. Then we have
$A=2*40=80m^{2}$

We know that he can shovel $20m^{2}$ in 10 minutes, so this would take him 40 minutes since 20*4=80. Now we just need to figure out how much this will cost. Since he charges $5.00 per half hour, we need to get 40 minutes in terms of half hours:
$\frac{40}{30}=\frac{4}{3}$

Last, we just multiply his half-hour rate by the amount of half hours he is shoveling for:
$\frac{4}{3}(5)=\frac{20}{3}$

I'll let you simplify the fraction.