A hall 20cm long and 10m wide,the area of its 4 walls is equal to the area of the floor and ceiling together. Find the height of the hall.
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CSA of cuboid = 2 × area of rectangle
2h (l+b) = 2 × l × b
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Use this formulae to find height
Cheers !!!!
2h (l+b) = 2 × l × b
...
...
Use this formulae to find height
Cheers !!!!
Answered by
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sols. we have, lenght=20cm and breadth=10m(i.e.,1000cm) since Area of hall will be = 2(l+b)h= 2(20+1000)h=2040cm> but,Area is also equal to area of floor+area of ceiling.therfore, area= 2(lb)=2(20)(1000)=40000cm>. now, 2040h=40000. hence,height=40000/2040.
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