Question

About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in a year? Write your answer in standard notation.

Answer 1

Hint: A week has 7 days and a year has 365 days. 230 billion litres of water flows through the river each day. Multiply 7 with 230 billion and 365 with 230 billion to get the quantity of water that flows through the river in a week and a year respectively. 1 billion has 9 zeros in it and 1 trillion has 12 zeros in it.


Complete step-by-step Solution:
We are given that about 230 billion litres of water flows through a river each day.
We have to find how many litres of water flows through that river in a week and a year.
One day 230 billion litres
230 billion=230,000,000,000
One week =7 days
Quantity of water that flows through the river in a week is
$
   = 7 \times 230,000,000,000 \\
   = 1,610,000,000,000litres \\
 $
1 trillion=1,000,000,000,000
1,610,000,000,000 litres is 1 trillion 610 billion (One trillion six hundred and ten billion) litres in standard notation.
One year =365 days
Quantity of water that flows through the river in a year is
$
   = 365 \times 230,000,000,000 \\
   = 83,950,000,000,000litres \\
 $
1 trillion=1,000,000,000,000
83,950,000,000,000 litres is 83 trillion 950 billion (Eighty three trillion nine hundred and fifty billion) litres in standard notation.


Note: Standard notation is the normal way of writing numbers. Standard notation is the opposite to Scientific notation which is writing numbers without using powers of 10.