Question

The amount of what used by a washing machine varies directly with the weight of the load being washed. The washing machine uses 28 gallons to wash 7 pounds of clothing. How many gallons of water will the machine use to wash 24.5 pounds of laundry?

Answer 1

140 gallons of water would it use for 10 loads of laundry.

Explanation:

w ∝ l

w = kl

k = proportionality constant.

For, w = 28 gallons

l = 2 loads of laundry

Put in the equation;

28 = 2 k

k = 14

Now, when l = 10 loads of laundry, w = ?

w = 14 × 10

w = 140