Question

Nini works at wage of $8.80 per hour in a pottery shop. She has worked for 24.6 hours in a week. Estimate her earnings in that week.

• A. $220
• B. $225
• C. $250
• D. None of these

Answer 1

The correct option is B $225

$\text{Nini's wage per hour}=8.80$

$\text{Total hours worked in the week}=24.6$

$\text{Week's earning}=8.80\times 24.6$

To estimate the product $8.80\times 24.6$ we need to estimate 8.80 and 24.6 to nearest natural number.

For estimation to nearest natural number we look at tenths place and follow the estimation rule

Rule: If the digit is 5 or greater than 5 we round up, if the digit is less than 5 we round down.

8.80 has 8 at tenths place, it rounds up to 9
Similary,
24.6 has 6 at tenths place, it rounds up to 25
So, $8.80\times 24.6=9\times 25=225$

Shivani's estimated earning of the week is $225