Answer:
30
Step-by-step explanation:
Answer:
.
Step-by-step explanation:
We are given that
and
(because that's the ground), so substituting that into
gives
.
We know that the sum of the interior angles of a triangle equals 180, then,in this case we have the following equation:

then, solving for b, we get:

now that we have that b = 41, we can find the measure of each angle:
total distance travelled=72+69=141
time taken in hours for journey= (48/60)h + (69/60)= 1.95 h
average speed=141km/1.95h= 72.3km/h (3 sf)
Answer:
debes hacer l regla de tres
Step-by-step explanation: