Physics, asked by subodhroy597, 3 months ago

8. A machine made up of two or more sloping surfaces is known as a

Answers

Answered by confusedgenius1000
2

Answer:

A machine made up of two or more sloping surfaces is known as a wedge .

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Answered by Anonymous
92

Length of the plot with path = 30m + 1m = 31m

Breadth of the plot with path = 25m + 1m = 26m

Perimeter of a rectangle = 2 ( length + breadth )

==> 2 ( 31m + 26m )

==> 2 ( 57m )

==> 114m

Therefore, the perimeter of the plot along with the path is 114m.

.

Length of the pond = 25m

Breadth of the pond = 22m

Area of the pond = length × breadth

==> 25m × 22m

==> 550m²

Length of the pond with boundary = 25m + 2 1/2m = 25m

Breadth of the pond with boundary = 22m + 2 1/2m = 24.5m

Area of the pond with boundary = length × breadth

==> 25m × 24.5m

==> 612.5m²

Area of the boundary = Area of pond with boundary - Area of the pond

==> 612.5m² - 550m²

==> 62.5m²

Therefore, the area of the boundary around the pond is 62.5m²

.

A square grass plot 600m long is bordered on the outside by a path 10m wide. Find the cost of paving the path at Rs.250 per 100m².

Not getting it...Will try to solve it soon !!

.

100cm = 1m

Length of the table = 1.8m = 180cm

Breadth of the table = 1m = 100cm

Area of the table = length × breadth

==> 180cm × 100cm

==> 18,000cm²

Length of the book = 15cm

Breadth of the book = 10cm

Area of the book = length × breadth

==> 15cm × 10cm

==> 150cm²

No. of books on the table = Area of the table /Area of the book

==> 18,000cm²/150cm²

==> 120

Therefore, 120 books can be kept.

.

1m = 100cm

Length of room = 6m = 600cm

Breadth of room = 4m = 400cm

Area of the room = length × breadth

==> 600cm × 400cm

==> 2,40,000cm²

Length of the tile = 50cm

Breadth of the tile = 40cm

Area of the tile = length × breadth

==> 50cm × 40cm

==> 200cm²

No. of tiles required = Area of the room / Area of the tile

==> 2,40,000cm²/200cm²

==> 1200tiles

Therefore, 1200 tiles are required.

Total cost for 120 tiles if Rs.4.50 per tile :

==> Rs.4.50 × 1200 tiles

==> Rs.5400

Therefore, the total cost is Rs.5400.

.

Length of floor = 1.5m

Breadth of floor = 1.2m

Area of the floor = length × breadth

==> 1.5m × 1.2m

==> 1.8m²

Length of room = 6m

Breadth of room = 4.8m

Area of the room = length × breadth

==> 6m × 4.8m

==> 28.8m²

No. of students = Area of the room / Area of the floor

==> 28.8m² / 1.8m²

==> 16

Therefore, 16 students can be accommodated in the room.

.

Length of garden = 10m

Breadth of garden = 8m

Area of garden = length × breadth

==> 10m × 8m

==> 80m²

Each sapling requires 5m².

So, for 80m² : Area of garden / Area for each sapling

==> 80m²/5m²

==> 16

Therefore, 16 saplings are planted in the garden.

I've answered half in this question and half in another question !!

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