A car covers the first 55 km at the speed of 45 km / hr and next 15 at the speed of 65 km / hr . Calculate it's average speed for the whole juorney
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Answered by
1
Answer:
18 ᴋᴍ/ʜ
Step-by-step explanation:
Total time taken =
15
45
hrs+
25
50
hrs+
15
25
hrs=3hrs+2hrs+
3
5
hrs=
3
20
hrs
∴ Average speed of the car =30×
20
45+50+25
=
20
120×3
km/hr=18km/hr.
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