- A₹3240
- B₹3000
- C₹6240
- D₹2760
Step-by-Step Solution
Lawn inside . Path . Cost .
Answer: D) ₹2760
A garden 30 long and 20 wide has a 2 wide path running along the inside of its boundary (yellow). Gravel for the path costs ₹15 per . Find the cost.
Class 7Perimeter and AreaPerimeter and Area
Key idea: Parallelogram area
**Area of a parallelogram = base × height.**
Same idea as a rectangle, but the height is the perpendicular distance between the two parallel sides — NOT the slant length of the side. Pick any side as the base, drop a perpendicular to the opposite parallel side, measure that — that's the height.
Example: parallelogram with base 8 cm and perpendicular height 5 cm. Area = . The slant side could be longer; doesn't matter for area.
Perimeter of a parallelogram = 2 × (one side + adjacent side).
Same idea as a rectangle, but the height is the perpendicular distance between the two parallel sides — NOT the slant length of the side. Pick any side as the base, drop a perpendicular to the opposite parallel side, measure that — that's the height.
Example: parallelogram with base 8 cm and perpendicular height 5 cm. Area = . The slant side could be longer; doesn't matter for area.
Perimeter of a parallelogram = 2 × (one side + adjacent side).
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Perimeter and Area practice questions
More Class 7 Perimeter and Area practice
A lawn 60 m by 40 m has two cross paths, each 3 m wide, running through its middle…The violet square is drawn on squared paper, where each small square is 1 cm by 1 cm.…Compute these four areas and pick the one with the LARGEST area: A) triangle base 10 cm,…What is the standard value of π taken as a fraction in textbook problems?Assertion (A): The area of a triangle is half the area of a parallelogram on the same…