Question

Renae ices the bases of $30$ cakes with buttercream in $1$ hr and $45$ mins. Time Renae takes to ice base of one cake with buttercream is.

• A. $4$ mins $30$ secs
• B. $4$ mins $25$ secs
• C. $4$ mins $20$ secs

Answer 1

The correct option is A $4$ mins $30$ secs

Time taken by Renae to ice buttercream of $30$ cake = $1$ hr $45$ mins
$(\because 1\text{hr}=60\text{mins})$
$1\text{hr}+45\text{mins}=60+45=105\text{mins}$

$\therefore$ Time taken to ice base of one cake with buttercream$=\frac{105}{30}=4\frac{1}{2}$ mins
$\because \frac{1}{2}$ min = $30$ secs

$\Rightarrow 4\frac{1}{2}$ mins = $4$ mins $30$ secs

Therefore, Time taken to ice base of one cake with buttercream is $4$ mins $30$ secs.