A can do a piece of work in 3 days and B in 6 days andShyam in 12 days. In how many days will they finish it when both work at it.​

Ram's 1 day's work =  

6 1

​  

Shyam's 1 day's work =  

121

​

The part of work in 2 day's by both =2(  

6 1 +  12 1  )=2(  122+1  )=2×  12 3 =  2 1

​

Please mark brainliest.

Step-by-step explanation:

Step-by-step explanation:

= 1/3 + 1/6 + 1/12 (LCM 12)

= 4/12 + 2/6 + 1/12

= 6/12

= 1/2

Therefore 1/2 = 2 days

They will all work together and finish the job in 2 days

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second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

it should be a.

hope it