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

Question : 1

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 : 2

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 : 3

A number is increased by 20% and then it is decreased by 10%. Find the net increase or decrease per cent.

a) 10% decrease

b) 8% decrease

c) 8% increase

d) 10% increase

Question : 4

When the price of cloth was reduced by 25%, the quantity of cloth sold increased by 20%. What was the effect on gross receipt of the shop?

a) 5% decrease

b) 10% decrease

c) 10% increase

d) 5% increase

Question : 5

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 : 6

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