PERCENTAGE MCQ SET 5
Q1. If the price of petrol is increased by 28% , by what percentage should the consumption be decreased by the consumer . If the expenditure on petrol remains unchanged? (Correct to 2 decimal places)
(a)12.35%
(b)21.88%
(c)20.25%
(d)25.75%
Answer: B
Q2. If side of a square is increased by 10% then find % increase in its perimeter & diagonal
(a)10% , 10%
(b)10% , 21%
(c)20% , 21%
(d)20% , 20%
Answer: A
Q3. If radius of a circle is increased by 20% then find % increase in its circumference .
(a)10%
(b)20%
(c)30%
(d)40%
Answer: B
Q4. If each side if a cube is decreased by 12% , then the percentage decrease in its surface area is :
(a)25.66%
(b)28.23%
(c)22.56%
(d)26.54%
Answer: A
Q5. If the length of a rectangle is increased by 12% and the breadth is decreased by 8% , the net effect on the area is :
(a)Increase by 3.04%
(b)Increase by 2.6%
(c)Decrease by 3.04%
(d)Decrease by 2.6%
Answer: A
Q6. The length and the breadth of a rectangle are made to increase and decrease , respectively , by 8% and 10% . What is the percentage increase of decrease in its area?
(a)Decrease by 108%
(b)Increase by 1.8%
(c)Increase by 2.8%
(d)Decrease by 2.8%
Answer: D
Q7. Length and breadth of a rectangle are increased by 10% and 20% respectively . What will be the percentage increase in the area of rectangle ?
(a)21% increase
(b)28% increase
(c)44% increase
(d)32% increase
ย Answer: C
Q8. The radius of a circle is increased by 300% . Then its area will increase by what percent?
(a)800% increase
(b)900% increase
(c)1500% increase
(d)1600% increase
Answer: C
Q9. The radius of a hemisphere is increased by 19% then what will be effect on total surface area and lateral surface area .
(a)41.61% decrease
(b)41.61% increase
(c)45 5/6% decrease
(d)44% decrease
Answer: B
Q10. If the radius of a cylinder is decreased by 16 percent , then by how much percent its height must be increased , so that the volume of the cylinder remains same ?
(a)32.96 percent
(b)41.72 percent
(c)45.28 percent
(d)36.43 percent
Answer: B
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