Question

Rohini had 81$ in her purse she spent 5/9, of her money did she have left in her purse

A container can hold 28l of water when full the container is 3/7 full how many liters of water are needed to fill the container completely

Answer 1

To find out how much money Rohini has left after spending \( \frac{5}{9} \) of her money, we can follow these steps:

1. Calculate the amount of money she spent:
\[
\text{Amount spent} = \frac{5}{9} \times 81 = \frac{5 \times 81}{9} = \frac{405}{9} = 45
\]

2. Subtract the amount spent from the original amount:
\[
\text{Amount left} = 81 - 45 = 36
\]

So, Rohini has **$36** left in her purse.

Next, to find out how many liters of water are needed to fill the container completely, we can follow these steps:

1. Find out how much water is currently in the container:
\[
\text{Current volume} = \frac{3}{7} \times 28 = \frac{3 \times 28}{7} = \frac{84}{7} = 12 \text{ liters}
\]

2. Calculate how much water is needed to fill the container:
\[
\text{Water needed} = \text{Total capacity} - \text{Current volume} = 28 - 12 = 16 \text{ liters}
\]

Thus, **16 liters** of water are needed to fill the container completely.