Question

3. Bill enters a 30 kilometre race. He runs the first

20km at a speed of x kilometres per hour and the
last 10km at (x-5) kph. His total time for the
race was 4 hours.
a) Write down an equation in terms of x and solve it.
b) What are his speeds for the two parts of the run?​

Answer 1

Did bill take a break? he must be tired.

Step-by-step explanation: