Walking at 3/5 of his usual speed, a man is 4 hours too late. Find his usual time. Suppose the usual speed of the man be x km/hr .Let distance travelled be D km Therefore usual Time taken = D / x.’. walking speed = 3/5. x Let distance travelled be D km we can … Read more
Three sums of speed distance and time are discussed in the video. The sums are given here. 1. A train 150 m long passes a telegrah post in 15 seconds.Find:a) Speed of the train in km/hr. b) Time taken by it to pass a plateform of 150 m long.Watch Solution in the Video … Read more
In this video sums related to relative speed of boat in standstill water stream and in a water stream having speed in the same direction and also in the opposite direction have been discussed. Watch the video and comment below. If you have sum of boat and stream then post it in the comment box. … Read more
The most important thing about this chapter is that the sums are very easy and can be solved by most of the students if the formula is known to him. Also it is more important to keep in memory the formula of speed, distance and time. The third most important point to note is the … Read more