Question

A car travels 60 km/hr at 30km /hr and then a further 180 km/ at 160 km/hr. Find the total time take and the average speed for the whole journey

Answer 1

Answer:

Time=3 hrs 7 mins 30sec / 3.125 hrs

Avg speed=76.8 km/hr

Step-by-step explanation:

speed=distance/time

time=distance/speed

part I

speed1=30km/hr         distance1=60km

time1=60/30=2hrs

part II

speed2=160km/hr       distance=180km

time2=180/160=3.125hrs (or) 1hr 7 mins 30 sec

total time taken=time1+time2= 2+1.125=3.125hrs

Average speed=total distance covered/total time taken

                        =(60km+180km)/3.125hrs

                        =240/3.125=    76.8km/hr

i hope this helped bro

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Answer 2

answer

430km/4hr

because

60km/hr+30km/hr+180km/hr+160km/hr

=430/4hrs