SOLUTION: A 30-inch television has a screen that is 18 inches high. How wide is the screen?

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Question 927568: A 30-inch television has a screen that is 18 inches high. How wide is the screen?
Answer by srinivas.g(540) About Me  (Show Source):
You can put this solution on YOUR website!
Height (h)= 18 in
30 inch screen means its diagonal length is 30 inches
so diagonal = 30 inches
wide is unknown
as per pythagorean theorem
+diagonal%5E2+=height%5E2%2Bwide%5E2
+30%5E2=+18%5E2%2Bwide%5E2
+900=324+%2Bwide%5E2
move 324 to the left

900-324+=+wide%5E2
+576+=wide%5E2
apply square root on both sides
+sqrt%28576%29+=sqrt%28wide%5E2%29
24 = wide
Result : wide =24 inches