Question

A charge of 90 C passes through a wire in 1 hour 15 minutes . what is the current in the wire

Answer 1

Current = C / seconds.

1 hour = 3600 seconds
15 minutes = 900 seconds

1 hour 15 minutes = 4500 seconds

90 C / 4500 sec = 0.02 amperes = 20 milliamperes

Answer 2

We calculate current from the formula:
$I= \frac{q}{t}$ , where q is a electric charge transferred over time t 
Time should be converted to seconds:
1h 15 min= 75min= 4500s
I=$\frac{90C}{4500s}=0,02A$ Result is in unit-Ampere