HEL PL The surface area of a right square pyramid is 50 square inches. If the sides of the base and the slant height of the pyramid are each multiplied by 4, what is the surface area of the new cone?
A. 800 in.
B. 200 in.
C. 100 in.
D. 54 in.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling