Question

During a week-long dry spell, the water level in a pond decreased by 4 in. Per day, except for two days when it decreased by half that amount. How much did the water level decrease in the pond in one week?

Answer 1

24 inches.

Explanation:

Given:

During a week the water level in a pond decreased by 4 in. Per day,

For two days, it decreased by half that amount =
`4*(1)/(2)=2\ inches\ per\ day`

Question asked:

How much did the water level decrease in the pond in one week?

Solution:

As we know, there are 7 days in a week.

For 5 days,

Each day water level decreased by = 4 inches

In 5 days, water level decreased by =
`4*5=20\ inches`

For exceptional 2 days:

Each day water level decreased by = 2 inches

In 2 days, water level decreased by =
`2*2=4\ inches`

Water level decreased in whole week = 20 + 4 = 24 inches

Therefore, water level decreased 24 inches in the pond in one week.