Question

if a train travels ( 30a2 + 15a - 10) kilometers in 10 hours what is its avenge speed

Answer 1

Answer:

the average speed of the train is

(30a2+15a-10)/10 km/hour

(3a2+3a/2-1) km/hour

Answer 2

Answer:

Average Speed = 3a² + 1.5a - 1

Step-by-step explanation:

Distance travelled =  30a² + 15a - 10 km

Time taken = 10 h

Average Speed = Distance/Time = $\frac{30a^{2} + 15a - 10}{10} = 3a^{2} + 1.5a - 1$ km/h

Hope this helps.....