A rectangular field is 90m by 70m. A man walks around it at the rate of 4kmper hour. What time will he take in making 5 rounds
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distance covered in one round = perimeter of rectangular field = 2×( length + breadth)
= 2×(90+70) =320m
total distance in 5 round = 5×320 m
speed = 4 km/h =(4×1000)/3600 =10/9 m/s
time taken = (5×320)×9/10= 1440 seconds= 24 minutes
= 2×(90+70) =320m
total distance in 5 round = 5×320 m
speed = 4 km/h =(4×1000)/3600 =10/9 m/s
time taken = (5×320)×9/10= 1440 seconds= 24 minutes
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