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