Mathematics · Mensuration
एक खुला घन (एक सतह खुली है) जिसके किनारे की लंबाई 10 सेमी है, को बाहर से रंगा जाना है। यदि रंगने की लागत ₹2 प्रति सेमी2 है, तो इसे रंगने की कुल लागत (₹ में) क्या होगी?
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