Question

11. The mass of a wooden block is 200 g and volume
17
is 250³ cm. Find the density of wooden block in
(a) gcm-3 (b) kgm-3
12
[(a) 0.8 gcm-3, (b) 800 kam-31​

Answer 1

Answer:

Let the edge of cube be l.

When the mass is on the cube of wood

200g+l

3

ρ

wood

g=l

3

ρ

water

g

l

3

ρ

wood

=l

3

ρ

water

−200....(I)

When the mass is removed

l

3

ρ

wood

=(l−2)l

2

ρ

water

....(II)

From equation (I) and (II)

l

3

ρ

water

−200=(l−2)l

2

ρ

water

l

3

−200=(l−2)l

2

2l

2

=200

l=10cm

Hence, this is the required solution