In a particular type of jewellery the ratio of gold and silver is 4 : 7. In such type of jewellery ornament, how many milligrams of gold has been mixed with 357 milligram of silver, is to be calculated.

In a particular type od steel, the ratio of iron and carbon is 49 :1 . Calculate to find, in 250 quintal of such steel how much iron is there.

In a particular type of steel, the ratio of iron and carbon is 49 : 1 . Let's calculate to find, in 250 quintal of such steel how much iron is there.

For making a flower garland of hibiscus and Indian marigold, 105 of these flowers were collected. If the ratio of hibiscus and marigold is 3:4 , find how many hibiscus and marigold are there. Also find how many more hibiscus must be collected so that the ratio of these two types of flowers become equal.

A diploid cell has 2n = 4. If this cell divides by mitosis, how many types of genotypes are formed amongst the daughter cells ? a. 1 b. 2 c. 3 d. 4

A factory manufactures two types of screws, A and B. Each type of screw requires the use of two machines, an automatic and a hand operated.It takes 4 minutes on the automatic and 6 minutes on hand operated machines to manufacture a package of screw A, while it takes 6 minutes on automatic and 3 minutes on the hand operated machines to manufacture a package of screws B. Each machine is available for at the most 4 hours on any day. The manufacturer can sell a package of screws A at a profit ofRs. 7 and screws B at a profit of Rs. 10. Assuming that he can sell all the screws he manufactures, how many packages of each type should the factory owner produce in a day in order to maximise his profit? Determine the maximum profit.

Gold has cubic crystals whose unic cell has edge length of 407.9 pm. Density of gold is 19.3 g cm^(-3) . Calculate the number of atoms per unit cell. Also predict the type of crystal lattice of gold (Atomic mass of gold = 197 amu)

What we call the algebraic expressions of the type 2x+3y+4z+7p+5q+6r which has many terms?

A semiconductor has the electron concentration of 4xx10^(12) "cm" ^(-3) and the hole concentration of 7xx10^(13)"cm"^(-3) . Is this semiconductor n-type or p-type ? Also calculate conductivity of its material. Given : Electron mobility =22000 "cm"^(2)."V"^(-1).s^(-1) and hole mobility =150 "cm"^(2)."V"^(-1).s^(-1)