The walls of the halls built for music concerts should

The walls of the halls built for music concerns should

Choose the correct option? The walls of the hall built for music concerns should A. amplify sound B. reflect sound C. transmit sound D. absorb sound

The walls of the auditorium built for musical concerts should be such that they are able to ... sound.

Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved ?

Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved ?

30 labourers can built a wall in 9 days. If the same wall is to be built by 20 labourers how many days they will take to complete it?