Originally Posted by lvleph
Since you are claiming others are wrong...
14 divided by 46 = 0.30435
0.30435 times 60 = 18.26 mph average speed
But why not be consistent and keep it to 4 significant figures like you have in the final answer?
14 divided by 46 = 0.3043
0.3043 times 60 = 18.26 mph average speed
The OP gave us two significant figure time, two s.f. distance, so you can only have
two significant figures in your final answer. So it's 18. Let's keep up here.