a) 78.5 liters

b) 72 liters

c) 70 liters

d) 68.5 liters

correct answer is: c) 70 liters

**Explanation**

Here we can use *‘Unitary Method’*.

17 days a family consumes = 42.5 liters of milk

\therefore 1 days they consume =\large\frac{42.5}{17} liters of milk

\therefore 28 days they consume =\large\frac{425\times28}{17\times10} liters of milk

\rightarrow 70 liters of milk**Ans:** 70 liters of milk will they consume in 28 days.

**An alternative way to phrase this particular query is possible:****1. How much milk will a family consume in 28 days if they consume 42.5 liters in 17 days?****2. What is the total milk consumption expected for a family over 28 days, if they currently consume 42.5 liters in 17 days?****3. Find the quantity of milk a family will use in 28 days given their consumption of 42.5 liters over 17 days.****4. Determine the milk consumption for a family over 28 days, based on their current rate of consuming 42.5 liters in 17 days.****5. Calculate the anticipated milk usage for a family over the course of 28 days, considering their consumption of 42.5 liters within 17 days.**