Question

Tick (✓) the correct answer:
A period of 4 hours 30 min is what per cent of a day?
(a) $18\frac{3}{4}\%$
(b) 20%
(c) $16\frac{2}{3}\%$
(d) 19%

Answer 1

(a) $18\frac{3}{4}\%$

$4h30min=\left(4\times 60\times 60\right)+\left(30\times 60\right)$
$=16200sec$
$24h=\left(24\times 60\times 60\right)$
$=86400sec$
$\mathrm{Now},\left(\frac{16200}{86400}\times 100\right)\%=18\frac{3}{4}\%$