Verified Answer :

We can use proportion to solve it
\(135 berries -------------15min\)
\(486 berrier --------------x\)
Our x is equal to =\(x= \frac{486*15}{135} =54\)min
Its our result

\(\begin{array}{ccc}135\ berries&-&15\ min\\\\486\ berries&-&\ x\ min\end{array}\ cross\ multiply\\\\\\135x=15\times485\\\\135x=7275\ \ \ \ \ |divide\ both\ sides\ by\ 135\\\\x=\frac{7275}{135}\\\\x=\frac{485}{9}\\\\x=53\frac{8}{9}\ (min)\approx54\ (min)\)

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