Question

please answer this fast with whole working, please please​

Answer 1

Answer:

9.6 or 9  3/5

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Step-by-step explanation:

here, we use ratio proportion and unitary method.

we can say that 20 : 12 :: 16 : n

when n is the unknown number of days it will take them.

now, we know that the product of means is equal to the product of extremes.

so,

20n = 12 x 16

n = 12 x 16/20

refer given attachment for further explanation.