Question

choose the correct option
A block of wood of density 0.8gcm-3 has a volume of 60cm3. The mass of block
is
1. 1.60.8 g
2.75g
3.48 g
4.0.013 g
(d) The density of aluminium is 2.7
​

Answer 1

3) 48g

Explanation:

d=0.8gcm^-3

v=60^3

mass=v×d

0.8×60g

=48g

Answer 2

$\bigstar$ Given

A block of wood of density 0.8 g cm⁻³ has a volume of 60 cm³

$\bigstar$ To Find

The mass of block

$\bigstar$ Solution

We know that

$\red{\sf \longrightarrow m=d \times v}$

Here

• m = mass
• d = density
• v = volume

According to the question

We are asked to find the mass of block

Therefore

We must find "m"

Given that

A block of wood of density 0.8 g cm⁻³ has a volume of 60 cm³

Hence

• d = 0.8 g cm⁻³
• v = 60 cm³

Substituting the values

We get

$\orange{\sf \longrightarrow m=0.8 \ g \ cm^{-3} \times 60 \ cm^{3}}$

On further simplification

We get

$\pink{\sf \longrightarrow m=48 \ g}$

Therefore

$\star$ Mass of block = 48 g

Hence

$\checkmark$ Option (3) is correct