SSC CHSL 12 Oct 2020 Shift 3 Paper

Three years ago, total age of husband, wife and child
$=26\times 3=78\mathrm{yr}$
Sum of their present ages
$=78+3\times 3$
$=78+9=87\mathrm{yr}$
Sum of ages of wife and son, $5\mathrm{yr}$ ago
$=2\times 20=40\mathrm{yr}$
Age of husband, 5 yr ago
$=78-2\times 3=32\mathrm{yr}$
Hence, present age of the husband
$=32+5=37\mathrm{yr}$