His reading speed is 100/2=<<100/2=50>>50 pages a day
He reads 2*1.5=<<2*1.5=3>>3 hours more now than before
So now he reads 2+3=<<2+3=5>>5 hours per day
That means he reads 5*50=<<5*50=250>>250 pages per day
So he reads 250*7=<<250*7=1750>>1750 pages a week
#### 1750