Question

Change into smaller units and add

$3$km $48$m and $25$km $135$m

Answer 1

We know that

$1$km $=1000$m

$3$km $=3000$m

$25$km$=25000$m

Thererefore,

$3$km$48$m $=3000+48$

$3$km$48$m $=3048$m $\to$$\overline{)1}$

$25$km$135$m$=25000+135$

$25$km$135$m $=25135$m$\to$$\overline{)2}$

Adding equations $\overline{)1}$ and $\overline{)2}$

$3048+25135=28183$m

Hence, the $28183$ meters is the required answer.