Explanation:
come on ! this is so simple. with just a tiny little bit of thinking you get this yourself.
1 inch = 50 miles.
so, how many miles are then 2 inches ? hmmm ?
could it be that it is just 2×1 inch = 2×50 miles ?
yes ! it is that simple !
2×50 = 100 miles.
and so, how many miles are 3 inches ?
uuuuuhhhh !
what do you think ?
3×1 inch = 3×50 miles
yeah !
3×50 = 150 miles !
yes, so simple, so easy.
this is like the old questions like "every child gets 2 pieces of candy. there are 6 children. how many pieces of candy do we need ?"