Answer:
81
Step-by-step explanation:
You need to work out 35% and add it to 100% to make 135%
To do that you work out 10% and multiply it by 3 to give you 30%. After that you need to work out 5% and add it to the 30%. You can work out 5 %by dividing the answer you get for 10%
100%=60 minutes
10%=6
30%=18
5%=3
35%=21
60+21=81 minutes
