ExamCompetition Forum Question Papers Ask A Question Mock Test Learn & Earn Sign Up Login Menu



24 vote

The length and breadth of a rectangle are increased by 20% and 25% respectively. The increase in the area of the resulting rectangle will be:

Asked on by | Votes 24 | Views: 2279 | Tags: mathematics     | mensuration     | quantitative aptitude     | ssc     | Add Bounty

The length and breadth of a rectangle are increased by 20% and 25% respectively. The increase in the area of the resulting rectangle will be:
1). 60%
2). 50%
3). 40%
4). 30%

SSC CGL Books


Share on Facebook      Share on Whatsapp       Share on Twitter




1 answers

30 vote
Answered by on | Votes 30 |

Let L = 100

Let B = 1000

Area = 100000

Now L increased by 20% i.e. 120

and B increased by 25% i.e. 1250

Now New area is $\large 120 \times 1250 = 150000$

Increase in area = 50000

Hence % increase $\large = \frac{50000}{100000} \times 100 = 50%$

Accepted Answer

Join Telegram Group




Other Questions

1. If the length of a rectangular plot of land is increased by 5% and the breadth is decreased by 10%,how much will its area increase or decrease

2. The circumference of the semicircle is 108 cm. If the side of a square is 30% more the diameter of the semicircle, what is the perimeter of the square ?

3. The height of an equilateral triangle is 15 cm. The area of the triangle is

4. $\triangle$ DEF and $\triangle$ GHI are similar triangles. Length of DE is 4 cm and length of the corresponding side GH is 9 cm. What is the ratio of areas of $\triangle$ DEF and $\triangle$GHI?

5. The two equal sides of an isosceles triangle is 20 cm each and the third side is 30 cm. What is the area(in sq.cm) of the triangle?

6. A cuboid has dimensions 16 cm x 20 cm x 20 cm. On one of its faces, a cube is pasted along the face so that the faces fit each other exactly. What will be the total surface area of structure formed?(in square cm)

7. The base of a solid right prism is a triangle whose sides are 9 cm, 12 cm and 15 cm. The height of the prism is 5cm.Then, the total surface area of the prism is

8. A copper sphere of radius 3 cm is beaten and drawn into a wire of diameter 0.2 cm. The length of the wire is

9. A solid wooden toy is in the shape of a right circular cone mounted on a hemisphere. If the radius of the hemisphere is 4.2cm and the total height of the toy is 10.2cm, find the volume of the wooden toy (nearly).

10. D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD : DB = 2 : 3 and area of ΔABC is 100 sq cm, what is the area (in sq cm) of quadrilateral BDEC?