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Units of area and their conversions - class-VIII

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The area of Square is $100cm^2$.It cuts in $4$equal sized Squares .Find area of one of them in $m^2$

  1. $.25m^2$

  2. $.025m^2$

  3. $25m^2$

  4. $.0025m^2$


Correct Option: D

The length of a square is given to be $3 cm$, then its area is _______

  1. $9 \, cm^2$

  2. $9 \, cm$

  3. $12 \, cm^2$

  4. $12 \, cm$


Correct Option: A

The area of triangle whose base is $4$ cm.and height is thrice the base ,in $m^2$ is

  1. $.24m^2$

  2. $.024m^2$

  3. $.0024m^2$

  4. $24m^2$


Correct Option: C

A saree has rectangular border of length $4m$ and breadth$3cm$.find area in $mm^2$

  1. $.12mm^2$

  2. $.012mm^2$

  3. $.0012mm^2$

  4. $12mm^2$


Correct Option: C

The area of square is equal to area of rectangle with length$8mm$ and breadth$2m$.Find its area in $cm^2$

  1. $160cm^2$

  2. $1.6cm^2$

  3. $.16cm^2$

  4. $none$


Correct Option: A

Ram has a plate in circular form which has design in $7$ meter radius .Find the area of design in $cm^2$

  1. $154cm^2$

  2. $15400cm^2$

  3. $1540000cm^2$

  4. $.154cm^2$


Correct Option: C

A Table top has length 12mm,breadth 8mm.Find the area of top in $m^2$

  1. $.096m^2$

  2. $.0096m^2$

  3. $.00096m^2$

  4. $.000096m^2$


Correct Option: D

A white Board has Area $88m^2$ is divided in $8$equal parts .Find area of each Square. 

  1. $10m^2$

  2. $11m^2$

  3. $20m^2$

  4. $none$


Correct Option: B

4 circular band has area$4m^2,3m^2,9m^2,0m^2$.Find there Total area.

  1. $15m^2$

  2. $16m^2$

  3. $10m^2$

  4. $none$


Correct Option: B

$4$ square Board of area $16cm^2$ are combined to form a big board.Find area of the bog board

  1. $64cm^2$

  2. $48cm^2$

  3. $16cm^2$

  4. $none$


Correct Option: A

A Pizza Seller makes a circular pizza of perimeter $44cm$.Find its area in$m^2$

  1. $.144m^2$

  2. $.0154m^2$

  3. $.36m^2$

  4. $none$


Correct Option: B

Consider a rectangle of length $4$ cm and breadth $3$ cm. Find the area of given rectangle with suitable units.

  1. $12\ cm^{2}$

  2. $12\ cm$

  3. $13\ cm^{2}$

  4. $13\ cm$


Correct Option: A
Explanation:

Area of rectangle=length$\times $ breadth


$\Rightarrow 4\times 3=12  \ cm^2$

Take a circle with radius $5$ m, then determine the area of given circle with suitable units.

  1. $78.53\ m$

  2. $78.53\ m^{2}$

  3. $78.53\ cm$

  4. $78.53\ cm^{2}$


Correct Option: B
Explanation:

Area of circle$=\pi { r }^{ 2 }=\cfrac { 22 }{ 7 } \times 5\times 5=78.57m^2$

A square field is 40m long. The perimeter of the square field is (in cm)

  1. $14000 \, cm$

  2. $16000 \, cm$

  3. $12000 \, cm$

  4. $8000 \, cm$


Correct Option: B

By converting the $0.0287m^2$ into the $cm^2$, the answer will be

  1. $28.7 \, cm^2$

  2. $2870 \, cm^2$

  3. $287 \, cm^2$

  4. None of these


Correct Option: C

A rectangular field is 40m long and 30m wide. perimeter of rectangular field is

  1. $120$m

  2. $130$m

  3. $140$m

  4. $150$m


Correct Option: C

If $1 \, m^2$ of a certain plot in a certain area costs Rs. $1500,$ how much does $1$ hectare cost?

  1. $15 \times 10^5$

  2. $15 \times 10^6$

  3. $15 \times 10^7$

  4. $15 \times 10^4$


Correct Option: B

By converting the 80.2km into the hectare, the answer will be

  1. 0.08020ha

  2. 8020ha

  3. 802ha

  4. 0.802ha


Correct Option: B

By converting the 4.8mm into the cm, the answer will be

  1. 0.048cm

  2. 0.48cm

  3. 48cm

  4. 480cm


Correct Option: A

By converting the $4.8mm^{2}$ into the $m^2,$ the answer will be

  1. $4.8 \times 10^{-7} m^2$

  2. $4.8 \times 10^{-6} m^2$

  3. $4.8 \times 10^{-8} m^2 $

  4. $4.8 \times 10^{-5}m^2$


Correct Option: B
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