Question

Abbas cover 30 km with a uniform speed of 60 km per hour and the next 30 km with a uniform speed of 40 km per hour find the total time taken and the average speed​

Answer 1

Explanation:

speed= distance/time

time =distance/ speed

30km cover in time= 30/60=1/2 hour

next 30km cover in time=30/40=3/4

total time taken=(1/2)+(3/4)=calculate and you will get the answer of first question.

total distance =30+40=70km

tatal time= from above calculation you will get

average speed=total distance/total time