Question

Book Back answer is:-
1.)600m²
2.)37.5m².

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Answer 1

Question 4)

A rectangular plot 70 m long and 55 m wide has a pathway 2.5 m wide running round inside the field. Find the area of the path.

Answer:

Length is 70 m, breadth is 55 m and width is 2.5 m.

Used formula: (l + b - 2w)2w

Substitute the values,

→ (70 + 55 - 2*2.5) × 2*2.5

→ (125 - 5) × 5

→ 120 × 5

→ 600 m²

Hence, the area of the path is 600 m².

Question 5)

A room 5.5 m long and 4 m wide is surrounded by verandah 1.5 m wide. Find the area of the verandah.

Solution:

Area of room = 5.5 × 4 = 22 m²

New length= 5.5 + 1.5 + 1.5 = 8.5 m

New breath = 4 + 1.5 + 1.5 = 7 m

New area of room = 8.5 × 7 = 59.5 m²

Area of the verandah = New area of room - Area of room

= 59.5 - 22

= 37.5 m²

Answer 2

Answer:

Hope these will help you.

see the above solutions

some important formula's i used in the above solutions are

outside the path=(l+b+2w)2w

Inside the path=(l+b-2w)2w