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Rates, SM-Bank 085 MC

The nutritional information on a breakfast cereal is shown below.

 

 
Kylie expends 1000 kJ of energy by rowing for 30 minutes.

If she consumes 100 grams of the cereal, approximately how long should she row to use up the energy it provides?

  1. 45 minutes
  2. 60 minutes
  3. 65 minutes
  4. 75 minutes
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\(D\)

Show Worked Solution

\(100\ \text{grams of cereal}\rightarrow 2460\ \text{kJ}\)

\(\text{Exercise required}\) \(=\dfrac{2460}{1000}\times 30\)
  \(\approx 2.5\times 30\)
  \(\approx 75\ \text{minutes}\)

 
\(\Rightarrow D\)

Filed Under: Rates Tagged With: num-title-ct-core, smc-4609-30-Energy, smc-4609-50-Word problems rates

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