Shopkeepers selling ice blocks usually cover them with jute sacks. Explain why.

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Solution

Shopkeepers selling ice blocks usually cover them with jute sacks because materials like jute sacks, saw dust and newspapers act as insulators and prevent escape or entry of heat through them. Due to this insulation ice blocks take a longer time to melt.
Hence, ice blocks can be kept without melting for a longer period of time by covering them with jute sacks.

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