1 Answer

Umar Sid · Answer 1 · 2023-02-10T20:37:43+0000

We know that

• A scientist uses 10 grams every 15 minutes.

To find the kilograms used in 3 hours, first, we transform 10 grams into kilograms

$(10)/(1000)kg=0.01\operatorname{kg}$

Then, we use the following proportion

$\frac{0.01\operatorname{kg}}{x}=(15\min )/(180\min )$

Because 3 hours is equivalent to 180 minutes. Let's solve for x

$\begin{gathered} x=(180\cdot0.01)/(15) \\ x=0.12 \end{gathered}$

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