(ii) Find the radius of inner circle ... (iii) Use, 2(Z + b) a 4s = 10 and find Z then find area of the rectangle. ... The required area = Area of sector of radius 7 cm with central angle 90Ad. ... New diameter = 3d cm, then new circumference x 100 = 3Ttd (iv) % increase = change in the circumference X 100 a#39; original circumference 13.

Title | : | The IIT Foundation Series - Mathematics Class 8, 2/e |

Author | : | Trishna Knowledge Systems |

Publisher | : | Pearson Education India - |

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