A car covers its first 72 kilometre at the speed of 60 km per hour and the rest 45 kilometre at the speed of 75 kilometre per hour find its average speed
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Answer:
A car covers four successive 3 km stretches at speeds of 10 kmph, 20 kmph, 30 kmph and 60 kmph respectively. Its average speedover this distance is: (compute to one decimal place.)
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Answer:
65
Step-by-step explanation:
72 + 45
----------------------
(72/60) + (45/75)
= 117/(6/5 + 3/5)
= 117*5/9
= 13*5 = 65
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