amar walks round a 72m×56m rectangular field at the rate 3km/hour.how much time will he take to take two round of the field
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prasad2511:
there he was asked 2 rounds
sorry this is only for 1 round for 2 rounds time taken =2( 5.12)=10.24min
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19
perimeter of park =2(l+b)
therefore 2(72+56)=2(128)
= 256m
2 rounds = 2×256= 512 metres
convert into km = 0.512km
60:3::x:0.512
therefore
3×x=60×0.512
3x=30.72
x=30.72/3
x=10.24 min need
therefore 2(72+56)=2(128)
= 256m
2 rounds = 2×256= 512 metres
convert into km = 0.512km
60:3::x:0.512
therefore
3×x=60×0.512
3x=30.72
x=30.72/3
x=10.24 min need
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