Question

If the cost of 1 kg wood is ₹ 5, then the price of 63 kg of wood is .

• A. ₹ 315
• B. ₹ 300
• C. ₹ 320
• D. ₹ 305

Answer 1

The correct option is A ₹ 315

Cost of 1 kg wood $=₹5$
Cost of 63 kg wood $=₹5\times 63$
$\begin{array}{ccc}& 60& 3\\ 5& 5\times 60& 5\times 3\\ & =300& =15\end{array}$

$63\times 5=(5\times 60)+(5\times 3)=300+15=315$

$\therefore$ The price of 63 kg wood is ₹ 315.