Question

a block of iron has dimensions 2cm x 4cm x 6cm the density of iron is 7.8g cm^-3 find the mass of the block

please give correct answer
and please tell fast ​

Answer 1

$\huge\mathcal{\fcolorbox{cyan}{black}{\pink{ANSWER}}}$

Given,

density d = 7.8 g cm^-3

Volume V = 2 cm × 4 cm × 6 cm = 48 cm^3

Mass m = to find

We know that,

$d = \frac{m}{v} \\ \implies \: m = d \times v \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 7.8 \times 48 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 374.4 \: \: g$