The length of a rectangle is increased by 25% and its breadth is decreased by 20%. What is the effect on its area?
Correct answer D. No change
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Maths MCQs & Aptitude MCQs
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Each side of a square tile is increased by 30%. By what percentage does the area of the tile increase?
Correct answer C. 69%
If the radius of a circular disc is reduced by 10%, by what percentage does its area decrease?
Correct answer A. 19%
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The length of a rectangular plot is increased by 40%. By what percentage must its breadth be decreased so that the area stays the same?
Correct answer B. 28 4/7%
The perimeter of a rectangular playground is 64 m and its length and breadth are in the ratio 5 : 3. What is its area?
Correct answer C. 240 sq m
The length and breadth of a rectangular room are in the ratio 4 : 3 and its floor area is 432 sq m. What is the perimeter of the floor?
Correct answer D. 84 m
The diagonal of a rectangular card is 25 cm and its length is 24 cm. What is the area of the card?
Correct answer B. 168 sq cm
A room is 9 m long and 6 m wide. A carpet 75 cm wide is to be laid on its floor. What is the cost of the carpet at Rs. 80 per metre length?
Correct answer B. Rs. 5,760
A floor 7.2 m long and 4.8 m wide is to be covered with square tiles of side 40 cm. How many tiles are needed?
Correct answer C. 216
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The diagonals of a rhombus-shaped garden are 24 m and 18 m long. What is the area of the garden?
Correct answer B. 216 sq m
A triangular signboard has a base of 26 cm and a corresponding height of 15 cm. What is its area?
Correct answer B. 195 sq cm
The hypotenuse of a right-angled triangle is 41 cm and one of the other two sides is 9 cm. What is the area of the triangle?
Correct answer B. 180 sq cm
A triangular plot has sides 17 m, 25 m and 28 m. Using Heron’s formula, what is its area?
Correct answer C. 210 sq m
A triangular park has sides of 25 m, 29 m and 36 m. What is the area of the park?
Correct answer D. 360 sq m
A triangular lawn with sides 26 m, 28 m and 30 m is to be turfed at Rs. 5 per square metre. What is the cost of turfing?
Correct answer D. Rs. 1,680
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What is the area of an equilateral triangle whose each side is 12 cm?
Correct answer D. 36√3 sq cm
A rectangular courtyard is 24 m long and 15 m wide. What is its area?
Correct answer D. 360 sq m
The diagonal of a square plot of land measures 18 m. What is the area of the plot?
Correct answer A. 162 sq m
A rectangular hall measures 18 m by 12 m. What will it cost to lay marble flooring in it at Rs. 45 per square metre?
Correct answer C. Rs. 9,720
A rectangular field is 75 m long and 48 m wide. What is the cost of fencing all around it at Rs. 26 per metre?
Correct answer D. Rs. 6,396