Question

A ractangle piece of ground is 40 m long and 35 m wide .find the total length of the boundary wall needed to fence this ground.​

Answer 1

Answer:

Area of the remaining ground is 1276 m²

Step-by-step explanation:

Solution :-

Length = 45 m

Breadth = 30 m

Area of whole piece of rectangular land = L*B

⇒ 45*30 = 1350 m²

area of the whole rectangular piece of land = 1350 m²

Length of the 1st road parallel to the length = 45 m

Breadth of the 1st road parallel to the length = 1 m

Area of the 1st road = 45*1

= 45 m²

Length of the 2nd road parallel to the breadth = 30 m

Breadth of the 2nd road parallel to the breadth = 1 m

Area of the 2nd road = 30*1

= 30 m²

Area of the common part of 2 roads = 1*1 

= 1 m²

Total area of 2 roads = Area of 1st road + Area of 2nd road - Area of common part

⇒ (45 + 30) - 1

⇒ 75 - 1

= 74 m²

the area of the 2 roads is 74 m²

Area of the remaining ground = Area of the whole rectangular piece of land - Area of 2 roads

⇒ 1350 - 74

= 1276 m²

Area of the remaining ground is 1276 m².