To Find Area of a Rectangle when Length and Breadth are of Different Units

To find area of a rectangle when length and breadth are of different units we need to convert and write them in same units and then solve.

For Example:

1. Find the area of a rectangle whose length is 15 cm and breadth is 50 mm.

Solution:

Length (l) = 15 cm.

10 mm = 1 cm.

Therefore, 50 mm = 50/10 cm = 5 cm.

Breadth = 5 cm.

Area = l × b

       = 15 × 5 sq. cm.

       = 75 sq. cm.

2. Find the area of a rectangle whose length is 32 m and breadth is 200 cm.

Solution:

Length (l) = 32 m.

100 cm = 1 m.

Therefore, 200 cm = 200/100 m = 2 m.

Breadth = 2 m.

Area = l × b

       = 32 × 2 sq. m.

       = 64 sq. m.


3. Find the area of a rectangle whose length is 17 cm and breadth is 85 mm.

Solution:

Length (l) = 17 cm.

10 mm = 1 cm.

Therefore, 85 mm = 85/10 cm= 8.5 cm.

Breadth = 8.5 cm.

Area = l × b

        = 17 × 8.5 sq. cm.

        = 144.5 sq. cm.


4. Find the area of a rectangle whose length is 21 m and breadth is 500 cm.

Solution:

Length (l) = 21 m.

100 cm = 1 m.

Therefore, 500 cm = 500/100 m = 5 m.

Breadth = 5 m.

Area = l × b

        = 21 × 5 sq. m.

        = 105 sq. m.


5. Find the area of a rectangle whose length is 41 m and breadth is 400 cm.

Solution:

Length (l) = 41 m.

100 cm = 1 m.

Therefore, 400 cm = 400/100 m = 4 m.

Breadth = 4 m.

Area = l × b

        = 41 × 4 sq. m.

        = 164 sq. m.

Area.

Area of a Rectangle.

Area of a Square.

To find Area of a Rectangle when Length and Breadth are of Different Units.

To find Length or Breadth when Area of a Rectangle is given.

Areas of Irregular Figures.

To find Cost of Painting or Tilling when Area and Cost per Unit is given.

To find the Number of Bricks or Tiles when Area of Path and Brick is given.

Worksheet on Area.

Worksheet on Area of a Square and Rectangle

Practice Test on Area.







5th Grade Geometry

5th Grade Math Problems

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