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in a group of 70 students,38 students passed in English, 15 in maths and 20 in Science. 9 students failed in all three subjects. 3 students were absent in exam. 9 students passed in exactly two subjects how many students passed in all three subjects? |
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Answer» Answer❣ Question : An object travels 20m in 4s and then other 20m in 10s . What is the average speed of the object ? Solution : As per the question we have TWO cases so let's assume each as Case 1 and Case 2 respectively ! Case 1 : Distance Covered : 20m Time TAKEN : 4 sec Speed : Distance / time : 20 / 4 : 5 m / sec Case 2 : Distance Covered : 20 m Time taken : 10 sec Speed : Distance / time : 20 / 10 : 2 m / sec huge average speed = total distance total time averagespeed=totaltimetotaldistance = \5 + 2 4 + 10=4+105+2 = 7 40 = 0.175=407=0.175 Hence , the average speed of the object is 0.175 m / sec !! hope that ur helpfull p lease follow and THANK you |
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