Question

10. The area of a rectangular field is 465 m² and its length is 31 m. Find the
a) breadth of the field - 15 metre
b) cost of fencing it at the rate of $15.50 per metre. 1426 F By​

Answer 1

Answer:

area=length x breadth

465=31*b

b=465/31=15m

cost of fencing

465*15.5=7207.5rupees

Answer 2

Given

Area of rectangular field ⇒ 465 m²

Length of rectangular field ⇒ 31 m

Breadth of rectangular field ⇒ x

Cost of fencing per metre ⇒ $15.50

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To Find

(i) The breadth of the rectangular field

(ii) Cost of fencing at the rate of $15.50 per metre.

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Solution

(i) Area of rectangular field ⇒ 465 m²

Area of rectangle ⇒ Length × Breadth

Length ⇒ 31 m

Breadth ⇒ 465 ÷ 31 = 15 m

∴ The breadth of the rectangular field is 15 m

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(ii) Area of rectangular field ⇒ 465 m²

Length ⇒ 31 m

Breadth ⇒ 15 m

Perimeter of rectangle ⇒ 2 × (Length + Breadth)

Perimeter of rectangular field ⇒ 2 × (31 + 15)

⇒ 2 × 46

⇒ 92 m

Cost of fencing per metre ⇒ $15.50

Cost of fencing the entire rectangular field ⇒ 92 × 15.50

⇒ $1426

∴ The cost of fencing the rectangular field would be $1426

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