Question

Mrs. v drives 2 hours at an average speed of 35 mph. Then she drives 3 hours at a speed of 48 mph. What is her average sped for the hole trip? Show how you got your answer. Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$\sf{Average~ speed =\frac{ total ~distance}{ total ~time}}$

$\sf{Average~ speed =\frac{ (35\times 2) + (48\times 3)}{ 2 + 3} =\frac{70+144}{5} =\frac{214}{5}=\boxed{42.8}}$

The average speed is 42.8 mph.