The surface of a swimming pool is rectangular in shape and measures 12 metre by 20 metre. A concrete walk 2 metre wide is to be built around the surface of the pool. What will be the surface area of the walk?
Answers
Answered by
7
Length of swimming pool = 20m
Breadth of Swimming pool = 12m
Therefore, Area of Swimming Pool = l x b
= 20m x 12m = 240 m sq.
Length of Inner Rec. = 20 - 2 = 18 m
Breadth of Inner rec.= 12 - 2 = 10m
Therefore, Area = l x b
= 18 x 10 = 180 m sq.
A.T.Q.===========>>>>>>>>>>>>>>
Surface area of Inner Path = Area of swimmng pool - Area of Inner Rec.
= 240 m sq. - 180 m sq.
= 60 m sq.
Answer is = 60 m sq.
Breadth of Swimming pool = 12m
Therefore, Area of Swimming Pool = l x b
= 20m x 12m = 240 m sq.
Length of Inner Rec. = 20 - 2 = 18 m
Breadth of Inner rec.= 12 - 2 = 10m
Therefore, Area = l x b
= 18 x 10 = 180 m sq.
A.T.Q.===========>>>>>>>>>>>>>>
Surface area of Inner Path = Area of swimmng pool - Area of Inner Rec.
= 240 m sq. - 180 m sq.
= 60 m sq.
Answer is = 60 m sq.
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Answered by
2
Initial Area of pool =l.b=12*20=240m²
When concrete wall is build around.....l=20+2=22m and b=12+2=14m
New area of pool =l.b=22*14=308m²
So atlast,area remained for walking=New area-Initial area=308-240=68m²
No, its wrong, to see the ans. go to https://raffles.guru/olympiad/math-olympiad/math-olympiad-questions-001.aspx. I know the ans., just want an explanation from you guys.
If still cant figure out the ques. Aayushi99 then I am telling it.It is 144 cm2
May be the answer on the website is wrong!!!
Last possibility is 68m²
Okay..i got my mistake.....
Initial Area of pool =l.b=12*20=240m² When concrete wall is build around.....l=20+“4"=24m and b=12+“4"=16m New area of pool =l.b=24*16=384m² So atlast,area remained for walking=New area-Initial area=384-240=144m²...
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