Question

Give answer people.. Thank you ​

Answer 1

Answer:

hi friend

we know that

power= work/time

power is 12 men

time is 18 days

therefore work=12*18=216

the work done by 12 men in 4 days is given by

216/2 =108

now the remaining work is 108

and this is done by 20men.

so,the time consume by 20 men is

108/20 =5.4

so the total time consume in whole process is

3+5.4=8.4

option third is correct

hope it helps you

Answer 2

Answer: 8.4

Step-by-step explanation:

Let the work done by 12 people in 18 days => 12×18= 216x

Then work done in 4 days by 12 workers => 4×12= 48x

Now, work remains => 216x - 48x = 168x

Now, days required for 168x work by (12+8=20) 20 workers =>168x/20= 8.4x

Therefore, total days required = 8.4 days