Question

Nora's friend Merry sketched a beautiful painting in $2,400$ seconds. How many minutes did she take to sketch the painting.

• A. $30$
• B. $40$
• C. $45$
• D. $50$

Answer 1

The correct option is B $40$

As we know,
$60\text{seconds}=1\text{minute}$
$\Rightarrow 1\text{second}=\frac{1}{60}\text{minute}$

$\therefore 2,400\text{seconds}=\frac{2,400}{60}=\frac{60\times 40}{60\times 1}=40\text{minutes}$

Therefore, (b) is the correct option.