The cost of whitewashing the four walls of a cubical room of side 6m at the rate of Rs 5 per.
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Step-by-step explanation:
Surface area of cube is = 4a sqare ( a mean side)
= 4(6)(6)
= 144msquare
1 rate of 1m = 5 Rs
rate of 144m= 144×5
= 720 Rs
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