The intensity of a sound wave gets reduced by 20% of passing through a slab. The reduction in intensity on passage through two such consecutive slabs is :

The intensity of a sound wave gets reduced by 20% of passing through a

1.	The intensity of a sound wave gets reduced by 20% of passing through a slab. The reduction in intensity on passage through two such consecutive slabs is :
Answer» 0.4 0.36 0.3 0.5 Answer :B

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The intensity of a sound wave gets reduced by 20% of passing through a slab. The reduction in intensity on passage through two such consecutive slabs is :

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