Elitmus
Exam
a car travels at a speed of 54km/hr in first hour and in second hour it has an average speed of 45km/hr.assume that there is instant start and stop,find the number of times car stops.
Read Solution (Total 3)
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- 9/54= 1/6 hr
and convert it into min so 60*(1/6)= 10 min
- 11 years agoHelpfull: Yes(13) No(0)
- distance covered by the car in 2nd hour= 45 km
distance it should have covered if it would not had start and stopped= 54 km
suppose it stopped for 10 mins.
so distance covered in 50 mins= 45 km
distance covered in 60 min=45/50* 60 = 54
so it stopped for 10 minutes - 11 years agoHelpfull: Yes(12) No(3)
- may be answer is 10 times after leave beginning and ending point.............
- 11 years agoHelpfull: Yes(2) No(5)
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