Question 7Aakash bought vegetables weighing 10 kg Out o

SOLUTION

We know that 1000 g = 1 kg

$\therefore 1g=\frac{1}{1000}kg$

$3kg500g=3kg+500g=3kg+1g\times 500=3kg+\frac{1}{1000}kg\times 500=3.500kg$

$2kg75g=2kg+75g=2kg+1g\times 75=2kg+\frac{1}{1000}kg\times 75=2.075kg$

Weight of onions                               = 3 kg 500 g = 3.500 kg

Weight of tomatoes                           = 2 kg 75 g = 2.075 kg

Total weight of onions and tomatoes = 3.500 + 2.075

$\begin{array}{cccccccc}\text{Hundreds}& \text{Tens}& \text{Ones}& .& \text{Tenths}& \text{Hundredths}& \text{Thousandths}& \\ 0& 0& 3& .& 5& 0& 0& \\ 0& 0& 2& .& 0& 7& 5& \\ +& & & & & & & \\ 0& 0& 5& .& 5& 7& 5& =5.575\end{array}$

Total weight of onions and tomatoes = 5.575 kg

Therefore, weight of potatoes           = 10.000 – 5.575

$\begin{array}{cccccccc}\text{Hundreds}& \text{Tens}& \text{Ones}& .& \text{Tenths}& \text{Hundredths}& \text{Thousandths}& \\ 0& 1& 0& .& 0& 0& 0& \\ 0& 0& 5& .& 5& 7& 5& \\ -& & & & & & & \\ 0& 0& 4& .& 4& 2& 5& =4.425\end{array}$

Thus, the weight of potatoes is 4.425 kg.