Question

common level of noise in industry is ______a) 80 to 120 db b) 90 to 130 db .c) 100 to 140 db .d) 110 to 150 db

Answer 1

hey|@@@


here is u r answer..

*(a)...


80 db to 120 db.

more than 90 db is harmful for us.

ok help u..