d) A movie time was 2hours. 10% of the time was taken advertisement. How long was the actual movie? ​

108 minutes

Step-by-step explanation:

Lets say that M+A is the time of the movie and the advertisement, so;

M+A = 2

And we know that 10% of that time is advertisement, mathematically that is:

A = 0,1*2

So replacing the second equation in the first one we have;

M + 0,1*2 = 2

M = 2-0,1*2 = 1,8 hours

We can convert hours into minutes multiplying by 60

1,8h*60min/h = 108min

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

three-fourths of an hour

36÷48=0.75

0.75=