Chapter 6

Based on the given data, how does the energy used in biking 1 km compare with that used in walking 1 km? Biking takes (a) \\(\frac{1}{3}\\) of the energy of walking the same distance; (b) the same energy as walking the same distance; (c) 3 times the energy of walking the same distance; (d) 9 times the energy of walking the same distance.