A car covers four successive 8 km distances at speeds of 12 km/hr, 18 km/hr, 24 km/hr and 36 km/hr, respectively. Its average speed (in km/hr) over this distance is:
A19.2
B20
C18
D22.5
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Related Questions:
Two trains start at the same time from Stations A and B respectively and travel towards each other at a speed of 60 km/h and 40 km/h, respectively. At the time they meet, the faster train has travelled 60 km more than the slower train. What is the distance between the two stations?
A policeman follows a thief, who is 150 metres ahead of him., and they run at the speed of 6 km/h and 5 km/h, respectively.What distance does the policeman cover to catch up with the thief?
In covering a distance of 72 km, Amit takes 5 hours more than Vinay. If Amit doubles his speed, then he would take 7 hour less than Vinay. Amit's speed is:
അമ്മു വീട്ടിൽ നിന്നും 40 km/hr വേഗതയിൽ സ്കൂളിലെത്തി അവിടെനിന്നും തിരികെ വീട്ടിലെത്തി. അമ്മു സഞ്ചരിച്ച ശരാശരി വേഗത 48 km/hr ആയാൽ സ്കൂളിൽ നിന്നും വീട്ടിലേക്കുള്ള യാത്രയിലെ വേഗത എത്ര?
For a trip of 800 km, a truck travels the first 300 km at a speed of 50 km/h. At what speed should it cover the remaining distance, so that the average speed is 60 km/hr?