What is the combined area, in square inches, of the front and back of

Question

What is the combined area, in square inches, of the front and back of a rectangular index card measuring 5 1/2 inches by 7 inches ?

A 35 
B 38.5 
C 77 
D 140 
E 154

Krittix · Answer

2(5.5x7)=11x14=22x7

20x7=140
2x7=14

140+14=154 (E)

Jabban · Answer

It's C, 77.

It's a card with a front and a back side, each measuring 5.5*7 inches, so each side is 38.5 square inches. For both sides, multiply by 2 to get 77.

Your multiplication in the first line is wrong - When you calculate 2*(5.5*7), you dont multiply 5.5 AND 7 by 2.

Tanshorey · Answer

Can someone please explain the answer for this ?

abuc0112 · Answer

Can someone please help with this problem. I got C but my answer is wrong.

ShubhadeepB · Answer

Bunuel 
Please explain.

chetan2u · Answer

For all the members above seeking an answer, the OA is wrong.

The area of each side =  5.5*7 
Area of both sides =  2*5.5*7=11*7=77

C

Crytiocanalyst · Answer

Area of the rectangle = 11/2 *7 =77/2

=>area of both the sides = 2*77/2 =77

Therefore IMO C

Archit3110 · Answer

Area of 1 face
11/2 *7 ; 77/2
For two face area would be
77/2 * 2= 77
Option c

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Fdambro294 · Answer

2 faces * (5.5) * (7)

Multiply by *(10/10) = *1

2 * (10/10) (5.5) (7)

(2/10) * (55) (7)

(1/5) * (55) (7)

(11) (7) = 77

(C) 77

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