Ravi to put a fence around his rectangular field of lenght 15 m. And breadth 10.what is the length of the fence needed?if hi has fans 20 meter how much more length needs to be fenced complete the boundary?
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Answer:
ਵਾਹਨ ਕਿਸ ਜਹਿਰੀਲੀ ਗੈਸ ਨੂੰ ਵਾਤਾਰਨ ਵਿੱਚ ਫੈਲਾਉਂਦੇ ਹਨ ?
(1) ਕਾਰਬਨ ਡਾਈਆਕਸਾਈਡ
(2) ਹਾਈਡਰੋਜਨ ਗੈਸ
(3) ਕਾਰਬਨ ਮੋਨੋ ਅਕਸਾਈਡ
(4) ਨਾਈਟਰਸ ਆਕਸਾਈਡ
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fence needed =perimeter=2(l+b)=2(15+10)=2(25)=50m
he fenced 20
hence remaining =50-20=30m
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