2 years ago

Length of a rectangle is three times its breadth. Perimeter of the rectangle is 40 cm. Find its length and width.

Mathematics

1 answer:

Harrizon [31]2 years ago

6 0

Answer:

The length is 15 and the width is 5

Step-by-step explanation:

Let the breadth be x cm then its length be 3x.

Perimeter of the rectangle = 2 (x+3x)

40=2(x+3x)

40=8x

x=5

breadth = 5

length = (5×3) = 15

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A cube has eight congruent faces.<br> true<br> false

bogdanovich [222]

False, it has 6 congruent faces

3 0

3 years ago

The area of a rectangle is 14 yd2 , and the length of the rectangle is 3 yd less than twice the width. find the dimensions of th

ExtremeBDS [4]

Let x be the width
2x-3= length

(2x-3)(x)=14
2x^2-3x=14
2x^2-3x-14=0
(2x- 7)(x+2)=0
x=7/2 or x=-2

Since we know that negative values cannot exist in distance, we have to take 7/2 to as the correct answer.

The width would be 3.5 yards
Length= 2(3.5)-3
=4 yards

3.5 x 4 yards is the dimension of the rectangle

Hope I helped :)

8 0

3 years ago

Select the answer choice that equals the given expression. 8^-3 x 8^-2 x ^5

Alexus [3.1K]

Answer:

B) 1

Step-by-step explanation:

Given:

$8^{-3}\times 8^{-2}\times8^5$