Instruments

Which in the following is a stringed Instrument ?

The limit of resolution of an instrument

Resolvingpower of an optical instrument is the ability of the instrument to………….or………..the images of………… .

Which of the following musical instrument is a reed instrument?

A dealer of scientific instruments allows 20% discount on the marked price of the instrument and still makes a profit of 25%. If his gain over the sale of an instrument is Rs 150 find the marked price of the instrument.