Mrs.o'dell built a wooden fence around her backyard.the yard is 21ft. long by 15ft. wide what's the all lenth.

Question

do i have to divide or multiply??

Answer 1

add the two measure-ments together and then Multiply by 2.

21+15 = 36

(two sets of sides to form the total shape) = 36 x2 is  72.

circumference of the shape.

north side ....21

east side .....15

south side ....21

west side .....15

=                     72.

to measure the Area (inside of the shape) you would Multiply the 2 measurements by each other.

21 x15 = 315.                                              :>)

Answer 2

MULTIPLY!

15

x21

15

+30

the answer is 45! (ft. that is!)

Answer 3

How many sides of her BACKyard is Mrs O'Dell going to fence?

If she's fencing all four sides the answer is: is 72 feet.

21ft + 21ft + 15ft + 15ft = 72 feet.

If she's only doing 3 sides the answer is: 57 feet.

21ft + 21ft + 15ft = 57 feet.

Answer 4

If you need to find perimeter, following is applicable:

P=2(l+w)=2(21+15)=72 feet

P.S: This task is easy(unless you are beginning of 2nd grade)

Answer 5

well is it a rectangle? need to know in order to get the right answer. need more info.

Answer 6

perimeter= (length x 2) + (width x 2)

perimeter= (21 x 2) + (15 x 2)

perimeter= 42 + 30

perimeter= 72 ft

Answer 7

lets assume the yard is a rectangle, so we would have two sides at 21ft, which equals 42ft,  and two sides at 15ft which equals 30 ft, total fence length 72ft.