Gold, Aluminum and platinum से भरा Asteroid

Asteroids are

There are two mixtures containing Gold, silver and platinum. First mixture contains 40% platinum and second mixture contains 26% silver. The percentage of gold in both mixtures are same. If 150 kg of first mixture is mixed with the 250 kg of second mixture, then the percentage of Gold in resultant mixture is 30%. Find the quantity of platinum in the resultant mixture.

Metals like silver, gold and platinum which do not corrode and do not react with oxygen even on strong heating are called ____ metals.

Size of an asteroid is

Give reason for the following: Silver, gold and platinum are used to make jewellery.

Gold, platinum and silver are used to make jewellery. Give reasons.