Question

The density of a material is 4gm/lit. In a system of
units in which unit of length is 5cms, unit of mass
is 10 gms then the density in new units is _____
a) 50
b) 40
c) 30
d) 100

Answer 1

Answer:

YOUR ANSWER IS (B)40

Explanation:

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GOOD EVENING

Answer 2

NOTE: This question is solved in g/cm^3.

To convert a physical quantity from one system to other -

n1[u1]=n2[u2]

where,

n2 = n1( [m1/m2]^a)( [l1/l2]^b)([t1/t2]^c)

therefore,

n1[u1]=n2[u2]

4g/cm3=n^2(100/(10)^3)=n2=40

Therefore the density of material will be 40 g/cm3.

Hence, option "b" will be your correct answer.

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