model 2 net increase or decrease in % Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

A number is first increased by 10% and then it is further increased by 20%. The original number is increased altogether by

a) 15%

b) 36%

c) 32%

d) 30%

Question : 2

If each side of a cube is increased by 10% the volume of the cube will increase by

a) 10%

b) 25%

c) 33.1%

d) 30%

Question : 3

When the price of an article was reduced by 20% its sale increased by 80%. What was the net effect on the sale?

a) 44% decrease

b) 75% increase

c) 66% increase

d) 44% increase

Question : 4

The tax imposed on an article is decreased by 10% and its consumption increases by 10%. Find the percentage change in revenue from it.

a) 2% decrease

b) 11% increase

c) 1% decrease

d) 10% increase

Question : 5

The length of a rectangle is increased by 10% and breadth decreased by 10% Then the area of the new rectangle is

a) increased by 1%

b) decreased by 10%

c) decreased by 1%

d) neither decreased nor increased

Question : 6

The difference between the value of the number increased by 20% and the value of the number decreased by 25% is 36. Find the number.

a) 0.8

b) 80

c) 720

d) 7.2