Adom's on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is?
A71.11km/hr
B68km/hr
C73.4km/hr
D65km/hr
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Machines A and B working together can do a piece of work in 6 days. Only A can do it in 8 days. In how many days B alone could finish the work ?
A man travels some distance at a speed of 12 km/hr and returns at a speed of 9 km/hr. If the total time taken by him is 2 hrs 20 minutes the distance is
ഒരാൾ 20 മീറ്റർ ഉയരമുള്ള ഒരു തൂണിൽ കയറാൻ ശ്രമിക്കുന്നു. ഒരു മിനിറ്റിൽ അയാൾം 3 മീറ്റർ മുകളിലേക്ക് കയറുമെങ്കിലും രണ്ട് മീറ്റർ താഴോട്ടിറങ്ങും. എത്രാമത്തെ മിനിറ്റിൽ അയാൾ മുകളിലെത്തും?
Two stations are 120 km apart on a straight line. A train starts from station A at 8 a.m. and moves towards station B at 20 km/h, and another train starts from station B at 9 a.m. and travels towards station A at a speed of 30 km/h. At what time will they meet?