a woman walks A certain distance in 84 minutes she covers two third of fit at 4 km per hour and the rest at 5 km per hour find the total distance covered
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Let total distance covered be D
Total time taken= 84min= 7/5 hrs
Time taken= distance./ speed
2D/3(4) +D/ 3(5) =7/5
(10D+4D)5= 21(20)
70D= 420
D= 420/70
D= 6
Therefore total distance covered = 6km
Total time taken= 84min= 7/5 hrs
Time taken= distance./ speed
2D/3(4) +D/ 3(5) =7/5
(10D+4D)5= 21(20)
70D= 420
D= 420/70
D= 6
Therefore total distance covered = 6km
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