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单选题The length of a rectangular kitchen floor is 3 feet more than its width, if the length of the floor is 12 feet, what is the area of the floor in square feet?A 9B 15C 42D 108E 44

题目
单选题
The length of a rectangular kitchen floor is 3 feet more than its width, if the length of the floor is 12 feet, what is the area of the floor in square feet?
A

9

B

15

C

42

D

108

E

44

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相似问题和答案

第1题：

Which of the following is the MAXIMUM cable length for 802.3 Ethernet?()

A. 33 Feet (10 meters)

B. 100 Feet (30 meters)

C. 328 Feet (100 meters)

D. 1200 Feet (366 meters)


参考答案：C

第2题：

Which of the following is the MAXIMUM cable length for 802.3 Ethernet?（）

  • A、33 Feet (10 meters)
  • B、100 Feet (30 meters)
  • C、328 Feet (100 meters)
  • D、1200 Feet (366 meters)

正确答案:C

第3题：

Tomas plans to construct a circular fishpond with a diameter of 9 ft. Which of the following is closest to the length, in feet, of the decorative fencing that Tomas needs to enclose the fishpond along its perimeter?

A.15

B.19

C.29

D.64

E.255


正确答案：C

第4题：

单选题
If one pair of opposite sides of a square are increased in length by 20% and the other pair of sides are increased in length by 50%, by what percent is the area of the rectangle that results greater than the area of the original square?
A

10%

B

50%

C

70%

D

75%

E

80%


正确答案： E
解析：
Suppose the length of a side of the original square is 10; then the area of that square is 10×10 or 100. Since one pair of opposite sides of the square are increased in length by 20%, and 20% of 10 is 2, the length of that pair of opposite sides of the new rectangle is 10+2 or 12. Since the other pair of sides are increased in length by 50%, and 50% of 10 is 5, the length of the other pair of opposite sides of the new rectangle is 10+5 or 15. The area of the new rectangle formed is 12×15 or 180, which is 80% greater than 100, the area of the original square.

第5题：

What is the recommended distance between controller-based access points for support ofroaming？（）

  • A、50 feet [15 meters]
  • B、200 feet [60 meters]
  • C、150 feet [45 meters]
  • D、100 feet [30 meters]

正确答案:D

第6题：

The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at ______．

A.safe speed only specified

B.not less than 120 feet per minute

C.not more than 120 feet per minute

D.not more than 90 feet per minute


正确答案：C

第7题：

Which three items does the Cisco WCS Planning Tool Generate Proposal Report provide？（） 

  • A、access point position， in feet， from a corner of the floor plan
  • B、SNR coverage map for 802.11a/n
  • C、data rate map for 802.11a/n
  • D、percent of coverage by signal

正确答案:A,C

第8题：

The boat is as long as 20 feet in ________ and 6 meters in width.

A. deep

B. length

C. long

D. square


参考答案：B

第9题：

单选题
If the area of a square with sides of length 8 centimeters is equal to the area of a rectangle with a width of 4 centimeters, what is the length of the rectangle, in centimeters?
A

4

B

8

C

12

D

16

E

18


正确答案： A
解析：
设长方形长为x，故4x=8×8，x=16，故本题选D项。

第10题：

单选题
The length of a rectangle is 5 more than the side of a square, and the width of the rectangle is 5 less than the side of the square. If the area of the square is 45, what is the area of the rectangle?
A

20

B

25

C

45

D

50

E

70


正确答案： D
解析：
设正方形的边长为x，那么根据题意有x2=45，所以矩形的面积为 (x+5)(x-5) =x2-25=45-25=20。

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