Question

Average daily rainfall during first 30 days of July was 1.5mm.however so much rain fell on 31 July that average daily rainfall For the month of July was 2 mm.what is the rainfall on 31 July.
Plz answer it with explanation

Answer 1

Answer:

Step-by-step explanation:

Step1-

Average rainfall=total rainfall in/number of days

Let the total rainfall till 30 july be x then,

1.5=x/30

x=45

Now let rainfall on 31st july be y

Then,

Average rainfall of july month will be

(x+y)/31

2=(45+y)/31

45+y=62

y=62-45

y=17

Hence total rainfall on 31st july was 17cm