Question

the room.
30. The area of a rectangle gets reduced by 8 m², if its length is reduced by 5 m and breadth
increased by 3 m. If we increase the length by 3 m and breadth by 2 m, the area is increased
by 74 m. Find the length and breadth of the rectangle.
31. A motorboat takes 6 hours to cover 100 km downstream and 30 km upstream. If the motorboat​

Answer 1

Answer:

ANSWER

Andaman Nicobar

The Andaman and Nicobar Islands, one of the seven union territories of India comprising 572 islands of which 37 are inhabited, are a group of islands at the juncture of the Bay of Bengal and Andaman Sea.

The territory is about 150 km (93 mi) north of Aceh in Indonesia and separated from Thailand and Myanmar by the Andaman Sea. It comprises two island groups, the Andaman Islands (partly) and the Nicobar Islands, separated by the 150 km wide Ten Degree Channel (on the 10°N parallel), with the Andamans to the north of this latitude, and the Nicobars to the south (or by 179 km). The Andaman Sea lies to the east and the Bay of Bengal to the west.

The territory's capital is the city of Port Blair. The total land area of these islands is approximately 8,249 km2 (3,185 sq mi). The islands host the Andaman and Nicobar Command, the only tri-service geographical command of the Indian Armed Forces. The territory is dived into three districts: Nicobar District with Car Nicobar as capital, South Andaman district with Port Blair as capital and North and Middle Andaman district with Mayabunder as capital.

The Andaman Islands are home to the Sentinelese people, an uncontacted people. The Sentinelese are the only people currently known to not have reached further than a Paleolithic level of technology.

I hope this will be help you.

Answer 2

Let length = x
Let breadth = y

Area in both scenario
( x - 5 ) ( y + 3) = area - 8
( x + 3 ) ( y + 2 ) = area + 74

Open brackets
xy + 3x -5y -15 = area - 8
xy + 2x + 3 y + 6 = area + 74

Subtract second from first:
x -8y -21 = -82
x - 8y + 61 = 0

Let Y = 10 ( assumption)
x -80 + 61 = 0
x = 19

Length = 19
Breadth = 10

Confirming:
Area = 19 x 10 = 190
Area in 1st = 14 x 13 = 182 ( which is 8 less)
Area in 2nd = 22 x 12 = 264 ( which is 74 more )