Math Problem 7

If the profit on an item is $4 and the sum of the cost and the profit is $20, what is the cost of the item?
(A)$24
(B)$20
(C)$16
(D)$12
(E) Cannot be determined from the information given.

Solution for GRE Math Problem 6:

From 6:15 to 7:15 the minute hand will drew a complete circle, 360°. Then, from 7:15 to 7:45, it drew a half of a circle, 180°. Total: 360+180=540

Answer:(D) 540°

See also these GRE problems: