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The intensity of a sound wave gets reduc...

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

A

0.36 l

B

0. 64 l

C

0.4 l

D

0.8 l

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-WAVES-ASSIGNMENT ( SECTION-B ( Objective type Questions ))
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