Question

3. A car travels 30 Km at a uniform speed of 40 Km/h and the next 30 Km at a
Uniform speed of 20 Km/h. Find its average speed? and: 26.67 Km/h

write the steps​

Answer 1

26.66 m/s

Explanation:

first we find time at v1=40km/h s1=30m so t1= s1/v1=30÷40= 0.75 seconds. now find t2=s2÷v2=30÷20=1.5 seconds Total time T=t1+t2=0.75+1.5=2.25 seconds. now find total distance D=D1+D2=30+30=60 METERS. AVERAGE SPEED = total distance /total time =60/2.25= 26.6 m/sec