Nisha goes to school with the speed of 4km per hour and back form school to home with the speed of 6km per . Calculate the average speed of Nisha of both sides journey in meter per second step by step explanation (Please answer it quickly)
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Let d km is the distance of the school from home.
Time taken by the student for going to school =d/4 hrs , and for comming = d/6 hrs
Total time =(d/4)+(d/6) = (3+2)d/12 =5d/12 hrs
The student in 5d/12 hrs covered (d+d)=2d km
Average speed = 2d/(5d/12) =24/5 =4.8 km/hrs.
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Let d km is the distance of the school from home. Average speed = 2d/(5d/12) =24/5 =4.8 km/hrs.
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