Phone Display Maths - Question 13

passyjango

A phone is said to have a 3.2-inches display. If the width of the display is 1.6-inches, what is the length of the display in cm. First correct answer (in our judgment) gets a N200 Glo Recharge PIN. Click Reply/Comment to answer. Editing after posting is no-longer allowed. So read your response carefully before posting. Result in 3 to 4 hours.<br /><br />Terms and conditions apply.

asocubed

lenght - 1.6 inches = 4.064cm approximately, 4.1cm

xdon

8.128 cm

Arvinkz

The lenght is 4.064 CM

martinkem

The size of screen displays is usually measured diagonally, so a 3.2 inch display implies that the diagonal screen is 3.2 inch long. <br />If the width of the screen is 1.6 inches, the length can be derived by using the pythagoras equation, where the square of the diagonal is equal to the square of the width plus the square of the length, so the length is the square root of the sum of the square of the diagonal and the square of the width,<br /><br />square of diagonal = 3.2 x 3.2=10.24<br />square of width = 1.6 x 1.6= 2.56<br />length of screen = square root of (10.24 - 2.56) = square root of 7.68<br />length of screen = 2.77 inches<br />which is 7.04 cm

MUSMAN

The length is 5.08cm

passyjango

Congratulations martinkem, you got it right. I will be sending you your N200 Glo Recharge PIN soon.

Muysmart

The phones display is rectangular shape, and it showed in 3.2inches which equals the area,<br />Mathematically:<br />AREA of the phone display equals LENGHT times{*} BREADTH, so<br />3.2=L*1.6,<br />L=3.2/1.6,<br />L=2.<br />So now the lenght of the phone display equals<br />2 inches.

amscins

Thanks for the reply.