Silver, copper, lead and zinc are melted together in the ratio of 2:6:7: 8 and formed into a
mass. One kg of zinc costs 15, a kg of lead 20% more than that of zinc, a kg of silver 20 times
that of lead. If the quantity melted was sold at 60 per kg, find the price of copper in per
kilogram.
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Hydraulic brakes work on the principle of Pascal’s law. According to this law whenever pressure is applied on fluid it travels uniformly in all the directions. Therefore when we apply force on a small piston, the pressure gets created which is transmitted through the fluid to a larger piston. As a result of this larger force, uniform braking is applied on all four wheels. As braking force is generated due to hydraulic pressure, they are known as hydraulic brakes. Liquids are used instead of gas as liquids are incompressible.
alokt018:
given:- ratio of silver, copper, lead and zinc 2:6:7:8 rate of:- zinc= rs. 15/kg, lead= (15×20/100)+15= rs.18/kg, silver= 18×20= rs.360/kg. price of mass= rs. 60/kg. to find= price of copper in rs./kg
let the quantity of silver be 2x, copper be 6x, lead be 7x and zinc be 8x. hence, qnt. of alloy= 23x. cost of alloy= 60×23x= 1380x. cost of silver= 2x× 360=729x. cost of copper= 6xy {y= price of copper}. cost of lead=126x. cost of zinc=120x
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