Answer:
200 minutes
Step-by-step explanation:
Let x minutes is needed to use for the cell phones to coast the same amount.
Now, f(x) = 35 + 0.11x ........ (1) {As per given conditions}
and g(x) = 55 + 0.01 x ......... (2) {As per given conditions}
Now, f(x) = g(x)
so, 35 + 0.11x = 55 + 0.01x
⇒ 0.1x = 20
⇒ x = 200 minutes.
Therefore, after using 200 minutes the cost of the call will be the same for both the plans. (Answer)