Question

Sudhir has a total of rupees 2100 as currency notes in the denomination of rupees 50, rupees 20 and rupees 10 the ratio of rupees 50 and notes and Rs 20 notes is 9 : 8 respectively if it has 122 not in total then how many notes of each denomination he has​

Answer 1

suppose no. of 50rs notes=9t

20rs notes=8t (as given)

then no. of 10rs notes = 122 -(9t + 8t)

= 122 - 17t

now as given in question ,

total sum = 2100

50×9t +20×8t +10×(122-17t) = 2100

by solving it gives t=2

so no. of 50rs notes =18

20rs notes =16

10rs notes =88

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Answer 2

Answer:

Properties of Metals

Physical Properties of Metals

Some physical properties of metals are listed below.

Shiny (lustrous) in nature

Metal is a good conductor of electricity and heat

Density and melting point is high

Mouldable (Malleable)

Ductile

At room temperature, it is in solid form except for mercury

Opaque

Chemical Properties of Metals

Some chemical properties of metals are listed below.

Easily corrodible

Can lose electrons

Form basic oxides

Have low electronegativities

Good reducing agents