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kkeith121p6ujlt
02.10.2019 •
Mathematics
Jim can paint a house in 12 hours. alex can paint the same house in 8 hours. enter an equation that can be used to find the time in hours, t, it would take alex and jim to paint the house together assuming they both work at the wages they work when working alone
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Ответ:
4.8 hr, or 4 hr 48 min
Step-by-step explanation:
Let '1' represent 'the whole house-painting job.'
Then perform a dimensional analysis:
1 whole house job
= 12 hours. →This restates the obvious: Jim can
1 job/ 12 hrs paint a house in 12 hours.
Now if both people work together, the total time required to paint the house is:
1 house job 1 house job
= = t for whole job
1 job 1 job 8 job-hr + 12 job-hr with both people
+ working
12 hours 8 hours 96 hr
This turns out to be:
1
= 96/20 hr = 4.8 hr, or 4 hr 48 min
20/96
Ответ:
The Height of isosceles Triangle = 12 meter
Step-by-step explanation:
Given as ,
A isosceles triangle each sides measure = 13 meter
Base of triangle = 10 meter
Let the height of triangle = H
Now Height (H) =![\sqrt{ a^2-{\frac{b^2}{4}}}](/tpl/images/0353/1752/aa281.png)
where B = base = 10 m
And a= sides = 13 m
So , H =![\sqrt{ a^2-{\frac{b^2}{4}}}](/tpl/images/0353/1752/aa281.png)
H =![\sqrt{ 13^2-{\frac{10^2}{4}}}](/tpl/images/0353/1752/c8ac6.png)
H =
= 12 meter
Hence , the Height of isosceles Triangle = 12 meter Answer