Question

What is the surface area of the figure?



A.
574 cm2

B.
427 cm2

C.
287 cm2

D.
504 cm2


http://static.k12.com/calms_media/media/1299500_1300000/1299602/1/631208c04b6363c5d4dee7f4e9e981ac9e220ba4/143847.jpg

Answer 1

Area of the "top"
14 by 7 = 98 PLUS
7 by 7 = 49
equals 147 centimeters

Answer 2

square centimeters actually

Answer 3

Geez I got bounced and lost a HUGE chunk of my calculations. ARRGGGHHHH!!


Area of BOTTOM = 147

Side = 14 * 5 = 70 PLUS
14 * 5 = 70 PLUS
5 * 7 = 35 PLUS
5 * 7 = 35 PLUS
5 * 7 = 35

245 sq cm SIDE TOTAL plus
147 TOP plus 147 BOTTOM =

539 sq cm total

Answer 4

Plus one more 5 * 7 = 35

Corrected total = 574 sq cm
Well, if I have multiplied and added correctly it seems the answer is A.

Answer 5

Yes, I am getting A too: 2( 14^2 - 7^2 + 14*5 + 14*5 ) = 574 cm^2.

Answer 6

Okay ranga - I'm glad SOMEBODY got the same answer!!
Seems you took the more elegant solution. (Computing the whole area then subtracting what doesn't belong).

Answer 7

You are welcome wolf.

Answer 8

Thanks :-)

Answer 9

Nice work guys!