Class 7 Area perimeter assignment

 

Class 7 Area, Perimeter And Volume

 

Q1. Find the cost of fencing a rectangular field 260m long and 175m wide at $40 per metre.

Ans:- P= 870m

Cost = 870 X 40 = $34800

 

Q2. Two parallel sides of a trapezium of length 27cm and 19cm , and the distance between them is 14cm. Find the area of the trapezium.

Ans:- 322cm^2

 

 

Q3. A gardener wants to fence his rectangular garden of length 200m and breadth 100m. if he wants to use three layers of wire to fence the garden, find the length of the wire required by him.

Ans:-

P=600m

Three layers of fencing = 600X3 = 1800m

 

Q4. The area of a trapeziumi 352cm^2 and the distance between its parallel sides is 16cm. if one of the parallel side is of length 25cm, find the length of the other.

Ans:- 19cm

 

Q5. Find the length of a rectangle whose perimeter is 450m and breadth is 97m.

P= 2 (L+B)

450= 2 (L+97)

450/2 = L+97

225 = L+97

225-97= L

L= 128m

 

Q6. Find the cost of fencing a square field of side 6m at the rate of $2 per metre.

Ans:- P= 4Xside

P= 24m

Cost = 2 X24 = $48

Q7. Every morning, Andy and Mandy go for a jog. Andy takes 3 rounds of a square park of side 200m while Mandy takes 4 rounds of a rectangular park of length 150m and breadth 100m. Who covers a greater distance?

Ans:- Andy = 2400m

Mandy = 2000m

Andy covers more distance

Q8. Find the area of a square whose perimeter is 84cm.

Ans:- Perimeter = 84cm

Side = 21cm

Area = 441cm^2

Q9. Find the area of circle whose radius is 14cm.

ANS:- 616CM^2

Q10. Find the area of a semi circle whose radius is 21m.

ANS:- 692M^2

Q11. Find the area of a quadrant WHOSE RADIUS IS 7M.

Ans:- 38m^2