Revenge

I've wasted 5 minutes of my life watching Grumpy John's "80 mph" post (including "Deer Crossing" video) and need to get even:p:p

William and Kate (you may have heard of them) go walking hand-in-hand around their estate. The walk is 5 kilometrs in length.

Before starting they record their vital statistics:

	William	Kate
Blood pressure	125 / 78	128 / 80
Pulse rate	65 bpm	70 bpm
Respiration rate	12	15
Height	187cm	165cm
Weight	85 Kg	70kg
Length of stride	93cm per step	82cm per step

The walk takes 1 hour and they then compare their vital statistics against those recorded before the walk.

William is obviously in great physical condition and there is virtually no change between his starting and ending stats. Only his Pulse rate increased noticeably from 65 to 86 bpm.

On the other hand Kate is still to regain her pre – pregnancy fitness; her stats have changed significantly:

	Before	After
Blood pressure	128 / 80	132/ 85
Pulse rate	70 bpm	122 bpm
Respiration rate	15	19
Height	165cm	n/c
Weight	70kg	n/c
Length of stride	82cm per step	78cm per step

At the start of the walk Kate was taking 122 steps per 100 meters compared with Willam’s 107. During the last 100 meters, Kate took 128 steps - an increase of almost 5% in the number of steps: William took exactly the same number of steps as he took in the first 100 meters. In total, Kate took 6245 steps compared with Wiliam’s 5350; almost 17% more steps than William .

Question 1: What is William’s average walking speed?

Question 2: Is Kate’s average walking speed –
a. 17% higher than William’s?
b. 5% higher than William’s?
c. 17% lower than William’s?
d. 5% lower than William’s?
e. the same as William’s ?

This should be easy, so I reckon I am still owed at least 4 minutes:no:

Bob