Question

EXAMPLE 39 The inclined faces of biprism of refractive index1.50 makes angles
of2° with its base. A slit illuminated by monochromatic light is placed at a distance
of10 cm from the biprism. If distance between two dark fringes observed at distance
of 1 metre from biprism is 0.18 mm, find the wavelength of light used.​

Answer 1

Answer:

ANSWER

Profit on white cement bag =Rs.+9

Loss on grey cement bag =Rs.−5

Profit on 1 bag of white cement =Rs. 9

Profit on 7000 bags of white cement =9×7000=Rs. 63000

Loss on 1 bag of grey cement =Rs.−5

Loss on 6000 bag of grey cement =(−5)×6000=Rs.−30000

Now, Total profit/loss = Total profit + Total loss

=63000+(−30000)

=33000

∴ Total Profit =Rs. 33000

I hope this will be help you.