Amanda uses 80 kilocalories of energy per kilometre while she is running.

She eats a burger that contains 2180 kilojoules of energy. How many kilometres will she need to run to use up all the energy from the burger? Give your answer correct to one decimal place. (1 kilocalorie = 4.184 kilojoules)  (2 marks)

Cassius is a boxer and skips to keep fit.

The table below shows the average energy used, in kilojuoles per kilogram of body mass, by a person skipping for 10 minutes at different speeds.

Cassius eats a hamburger that contains 550 kilocalories.

If Cassuis weighs 72 kilograms, how long must he skip at 150 skips per minute to burn off the energy contained in the hamburger? (1 kilocalorie = 4.184 kJ) Give your answer to 1 decimal place.  (3 marks)

The table shows the average energy used, in kilojoules per kilogram of body mass, by a person walking for 30 minutes at different speeds.

\begin{array} {|c|c|}
\hline
\rule{0pt}{2.5ex} \text{Walking speed} \rule[-1ex]{0pt}{0pt} & \text{Energy used in 30 minutes} \\
\hline
\rule{0pt}{2.5ex} \text{3 km/h} \rule[-1ex]{0pt}{0pt} & \text{5.53 kJ/kg} \\
\hline
\rule{0pt}{2.5ex} \text{5 km/h} \rule[-1ex]{0pt}{0pt} & \text{7.37 kJ/kg} \\
\hline
\end{array}

Rob, who weighs 90 kg, drinks a large cappuccino made with full cream milk. It contains 146 kilocalories.

For approximately how long must Rob walk at 3 km/hr to burn off the energy contained in the cappuccino? (1 kilocalorie = 4.184 kilojoules)

1. 28 minutes
2. 37 minutes
3. 83 minutes
4. 110 minutes

Oscar and Nadine select a meal each from the table below.
 

 
Oscar has a hamburger and Nadine has the lamb souvlaki.

After dinner, Oscar goes for a run where he expends energy at 25 kJ/minute.

At the same time, Nadine goes for a brisk walk where she expends 12 kJ/minute.

Who will expend the kilojoule intake from their dinner the quickest, and by how many minutes?  (3 marks)