1 3/4 for each batch to make 2 1/2 batches you need to take the amount of raisins for one batch 1 3/4 and multiply it by 2 1/2 the amount of batches.
1 3/4*2 1/2= 4 3/8 cups of raisins
The new coordinates are (3, 1)
You just have to cross multiply. 20 x 285 = 5700. 5700 / 95 = 60.
He will run 60km