3 years ago

30men can finish 1/7of a work in 2days.18men will do othe remaining work in ?

1 answer:

7 0

7/7-1/7=6/7 is the rest of work
1/7 work takes 2days
6*1/7=6/7 work takes 6*2days=12days
30 men takes 12 days to finish the rest of work (6/7)
18 men takes 18*12/30= 7.2days

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Step-by-step explanation:

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The side opposite the right angle is the hypotenuse, which is 9.
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The trigonometric ratio that relates opposite side to hypotenuse is SINE.

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Since, we need angle A, $\theta$ is A, opposite side is 3, and hypotenuse is 9, we substitute:

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To solve for the angle, we use our calculator and find the inverse sin of $\frac{1}{3}$ :

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B is the right choice.

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