In an equilateral triangle of side 24 cm, a circle is inscribed

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41.

In an equilateral triangle of side 24 cm, a circle is inscribed touching its sides. The area of the remaining portion of the triangle is ( √3 = 1.732 )

  • 98.55 sq cm

  • 100 sq cm

  • 101 sq cm

  • 95 sq cm


A.

98.55 sq cm

Side (a) = 24 cm

Area space of space triangle space space equals space fraction numerator square root of 3 over denominator 4 end fraction space cross times space left parenthesis side right parenthesis squared
space equals space fraction numerator square root of 3 over denominator 4 end fraction space cross times space 24 space cross times space 24 space equals space 144 square root of 3 space sq. space cm space equals space 144 space cross times space 1.732 space equals space 249.408 space cm squared

In radius = fraction numerator straight a over denominator 2 square root of 3 end fraction space equals space fraction numerator 24 over denominator 2 square root of 3 end fraction space equals space 4 square root of 3 space cm
Area of circle = πr squared
space equals space 22 over 7 cross times space 4 square root of 3 space cross times space 4 square root of 3
equals space 1056 over 7 space equals space 150.86 space cm squared
Area of remaining part
= (249.408 - 150.86) cm2
equals space 98.548 space sq. cm space almost equal to space 98.55 space cm squared


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42.

Two sides of a plot measuring 32 m and 24 m and the angle between them is a perfect right angle. The other two sides measure 25 m each and the other three angles are not right angles. The area of the plot in m2 is

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43.

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44.

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45.

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46.

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47.

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48.

A lawn is in the form of a rectangle having its breadth and length in the ratio 3 : 4. The area of the lawn is 1 over 12 hectare. The breadth of the lawn is

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49.

The area of a rectangle is thrice that of a square. The length of the rectangle is 20 cm and the breadth of the rectangle is 3 over 2 times that of the side of the square. The side of the square, in cm, is

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50.

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  • 400 square root of 2 space sq space. straight m.
  • 400 sq. m.

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