Question

The density of a material in SI unit is 128 kg m^-3. In certain units in which the unit of length is 25 cm and the unit of mass is 50 g, the numerical value of density of the material is _____.

विकल्प

• 40

• 16

• 640

• 410

Answer 1

The density of a material in SI unit is 128 kg m^-3. In certain units in which the unit of length is 25 cm and the unit of mass is 50 g, the numerical value of density of the material is 40.

Explanation:

n₁u₁ = n₂u₂

`128"kg"/"m"^3="n"_2(50"g")/((25"cm"^3))`

⇒ `128xx(1000  "gm")/((100"cm")^3) = "n"_2(50  "gm")/((25"cm")^3)`

⇒ n₂ = 40 units