एक ठोस गेंद एक घनाकार बक्से में पूरी तरह समाहित हो जाती है।
यदि घनाकार बक्से के किनारे की लंबाई a है, तो घनाकार बक्से में
बचे हुए भाग का आयतन ज्ञात कीजिए।
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Open fires and primitive cookstoves are fueled by solid materials, including coal and biomass (wood, dung and crop residue). These fuels release harmful particles into the air as they burn. When inhaled on a regular basis, these particles can cause diseases such as asthma, lung disease and pneumonia.
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