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) $19 \%$
Solution:
(a) $18 \frac{3}{4} \%$
$4 h 30 \min =(4 \times 60 \times 60)+(30 \times 60)$
= 16200 sec
Now, $\left(\frac{16200}{86400} \times 100\right) \%=18 \frac{3}{4} \%$
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