Question

3 The perimeter of a rectangular is 5 times the perimeter of a square of sales 10 cm if the length of the rectangle is 24 cm then area of the rectangle A) 1824 cm B) 1800 cm C) 1724.com D) 17200​

Answer 1

Answer:

Solution

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Let the breadth of the rectangle be x metres,

then perimeter=82m

⇒2(Length+Breadth)=82

⇒Length+x=41

⇒Length=41−xmetres

Now, Area=400m

2

⇒Length×Breadth=400⇒(41−x)x=400

⇒41x−x

2

=400⇒x

2

−41x+400=0⇒x

2

−25x−16x+400=0⇒(x−25)(x−16)=0

⇒x=25orx=16

Hence, breadth =25m or 16m

Answer 2

Answer:

Example 1.4.1:32.321020323101010Example 1.4.2:1790.17901009,000179,017100100Example 1.4.3:6120.6121,000Conversely, every fraction with integers in the numerator and denominator can beconverted to an equivalent decimal by dividing the numerator by the denominator usinglong division (which is not in this review). The decimal that results from the long divisionwill eitherterminate, as in10.254and522.08,25orrepeatwithout end, as in10.111...,910.0454545...,22and252.08333....12One way to indicate therepeating part of a decimal that repeats without end is to use a bar over the digits thatrepeat. Here are four examples of fractions converted to decimals.Example 1.4.4:30.3758Example 1.4.5:2596.47540Example 1.4.6:10.33Example 1.4.7:151.071428514