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★ The length and the breadth are in ratio 4 : 3 and its height is 5.5 m . The cost of decorating its walls at 6.60 Rs per m² is 5082 Rs . Find lengthand breadth ..
Let the ratios be 4x and 3x
It means ,
- Length = 4x
- Breadth = 3x
→ Finding Total Surface Area ( T.S.A. )
→ Cost of decorating
Now , Putting the value of x to Find L & B
- L = 4x = 40m
- B = 3x = 30m
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