MEDIUM

8th CBSE

IMPORTANT

Earn 100

The floor of a rectangular hall has a perimeter of $320 m$ . If its height is $12 m$ , find the cost of painting its four walls at the rate of $₹ 12$ per sq m.

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Important Questions on Enrichment Activities (Based on Chapters 13–19)

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q C

Find the cost of sinking a tubewell

280 m

deep, having diameter

3 m

at the rate of

₹ 3.50

per cubic metre.

HARD

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

The price of a commodity has increased by

20 %

. Find the reduction in the consumption of the commodity by a consumer so that there is no increase in his expenditure.

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

In an election between two contestants

A

and

B

A

got

60 %

of the valid votes. If

15 %

of total

500000

votes were declared invalid, find the number of valid votes polled in favour of

B

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

Find a single discount equivalent to the given discount series:

10 %, 20 %, 25 %

HARD

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

A

sold a pen to

B

at a gain of

12 \frac{1}{2} %

B

C

at a loss of

4 %

and

C

D

at a gain of

\frac{100}{3} %

. If

A

bought it for

₹ 37.50

, how much did

D

pay for it?

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

If an article is sold at a gain of

5 %

instead of being sold at a loss of

5 %

, a man gets

₹ 5

more. What is the cost price of the article?

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

Divide

₹ 12615

between

A

and

B

so that the amount received by

A

in two years is equal to the amount received by

B

4

years. Interest is

5 %

per annum, compounded annually.

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 31 - Enrichment Activities (Based on Chapters 13–19)>ENRICHMENT ACTIVITIES (Based on Chapters 13-19)>Q D

Piyush started a business with an initial investment of

₹ 500000

. In the first year he incurred a loss of

4 %

. However during the second year, he earned a profit of

5 %

which in the third year rose to

10 %

. Calculate the net profit for the entire period of

3

years.

The floor of a rectangular hall has a perimeter of 320 m. If its height is 12 m, find the cost of painting its four walls at the rate of ₹12 per sq m.

Important Questions on Enrichment Activities (Based on Chapters 13–19)

Learn and Prepare for any exam you want !

The floor of a rectangular hall has a perimeter of $320 m$ . If its height is $12 m$ , find the cost of painting its four walls at the rate of $₹ 12$ per sq m.