Laila went for a $10 \mathrm{~km}$ run. She ran the first $5 \mathrm{~km}$ in 30 minutes, then rested for 25 minutes. She then ran the rest of the way in 35 minutes. Work out the value of $t$.

Step 1 ：Laila ran the first 5 km in 30 minutes, rested for 25 minutes, and then ran the remaining 5 km in 35 minutes.

Step 2 ：To find the total time, we add the time spent running and resting: \(30 + 25 + 35\)

Step 3 ：\(30 + 25 + 35 = 90\)

Step 4 ：\(\boxed{90}\)