Mathematics45 of an hour =

$\frac{4}{5}$ of an hour =

A
36 min.
B
48 min.
C
54 min.
D
24 min.

Solution:

$\frac{4}{5} \times 60$ min.

$= \frac{4 \times 60}{5 \times 1}$

$= 48$ min.

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