Question 705020

SCQMEDIUM

An egg tray has 30 cavities to hold eggs in 5 rows and 6 columns. Each cavity is surrounded by 4 raised corners shared by adjacent cavities. How many raised corners does the egg tray have?

(A)

30

(B)

35

(C)

36

(D)

42

Detailed Solution

The grid of cavities is 5×65 \times 6. The corners are the intersection points of the grid lines. Number of vertical grid lines = 6+1=76 + 1 = 7. Number of horizontal grid lines = 5+1=65 + 1 = 6. Total intersections (raised corners) = 7×6=427 \times 6 = 42.

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