Math word problem

posted by .

The length&breadth of a rectangle are (x+5)cm&3cm respectively.Find the length if the area of the rectangle is 42 cm2.

• Math word problem -

length = x+5 cm
breadth = 3 cm

area = length x breadth

42 cm^2 = 3 cm(x+5 cm)

42 cm^2 = 3x cm + 15 cm^2

now solve for x

Similar Questions

1. algebra

1. The lenght of rectangle is greater than its breadth by 2 cm.If the length is increased by 4 cm and the breadth decreased by 3 cm ,the area remains th same . Find length and breadth of the rectangle ?
2. Math,Ratio

the length of a rectangle is 6times as long as its breadth. a.) what fraction of the perimeter of the rectangle is the length of the rectangle?
3. math

the length of a rectangle exceeds its breadth by 4cm. The length and breadth are increased by 3 cm .The area of the new rectangle will be 81cm square more than the given rectangle .Find the dimensions of the given rectangle?
4. Math Ratios

The ration of the length of a rectangle to its breadth is 9:4. If the perimeter of the rectangle is 104 cm. find the area of the rectangle.
5. math

the length of a rectangle exceed its breadth by 4cm.if length and breadth are incresed by 3cm the aera of the new reactangle will be 81cm more then that of the given reactngle.then a)length of the given rectangle is?
6. math

a rectangle has length (5-squareroot12)m and breadth (4+6/squareroot3)m. express in the form a+bsquareroot3, where a and b are integers, i)the area of the rectangle ii)the square of the length of the diagonal of the rectangle
7. linear-equations-in-one-variable

the length of a rectangle exceeds its breadth by 4 cm. if length and breadth are each increased by 3 cm, the area of the new rectangle will be 81 cm sqsq morthan that of the given rectangle. find the length and breadth of the given …
8. Math

A circular copper wire of radius 7cm is bent to form a rectangle. If the breadth and the length of the rectangle are in the ratio 4:7 respectively. What is the breadth of the rectangle?
9. Math

A circular copper wire of radius 7cm is bend to form a rectangle. If the breadth and the length of the rectangle are in the 4:7 respectively. What is the breadth of the rectangle?
10. math

the lenght of rectangle exceeds its breadth are each increased by 3 and the area of the new rectangle is will be 84 cm2 more than that of the give rectangle . find lenght & breadth.

More Similar Questions