Perimeter of a rectangle | Mensuration | Assessment | English | Grade 6

If the length of a rectangle is l cm and its breadth is b cm, then the perimeter of rectangle is _______ cm.

• 2l × 2b

• 2(l × b)

• 2(l + b)

• 2 + (l × b)

Tags

CCSS.4.MD.A.3

Perimeter of a rectangle with length 12 cm and breadth 8 cm is ________.

• 24 cm

• 40 cm

• 20 cm

• 32 cm

Answer explanation

Perimeter of rectangle = 2(l + b) = 2(12 + 8 ) = 2(20) = 40 cm So, option 2 is correct.

Tags

CCSS.4.MD.A.3

Perimeter of a rectangle is 62 cm. If the breadth if this rectangle is 13 cm, what is the length of the rectangle?

• 31 cm

• 49 cm

• 36 cm

• 18 cm

Answer explanation

Option 4 is correct.

Tags

CCSS.4.MD.A.3

Length of a rectangular park is 270 m and the width is 120 m. What is the distance travelled by Akanksha if she takes 3 rounds of the park?

• 780 m

• 2340 m

• 1170 m

• 3240 m

Answer explanation

Length = 270 m breadth = 120m Perimeter of rectangle = 2(l + b) = 2(270 + 120) = 2(390)=780 m Since Akansha runs 3 times, hence distance covered by Akanksha = 3 × perimeter of rectangle = 3 × 780 = 2340 m So, option 2 is correct.

Tags

CCSS.4.MD.A.2

Samiksha needs 36 m of lace to border a rectangular table cloth of breadth 5 m. What will be the length of the table cloth?

• 13 m

• 31 m

• 18 m

• 26 m

Answer explanation

Perimeter of rectangle = 2(l + b) = 36 m Hence, 36 = 2(l + 5 ) i.e 18 = (l + 5) i.e., l = 18 - 5 so, l = 13 m Hence, option 1 is correct.

Tags

CCSS.3.MD.D.8

Rakesh wants to fence his rectangular farm of length 720 m and breadth 450 m. If it costs ₹ 120 per metre, what will be the total cost of fencing?

• ₹ 140400

• ₹ 324000

• ₹ 280800

• ₹ 129600

Answer explanation

Option 3 is correct.

Tags

CCSS.4.MD.A.2