1.

The diameters of two circular plates are respectively 10 cm and 24 cm. What is thediameter of a plate which has area equal to the combined area of the two givenplates?

Answer»

Area of 1 st Plate = (22/7)(D/2)² = (22/7) (10/2)² = (22/7)* 25

Area of 2nd plate = (22/7)*(24/2)²= (22/7)*144

Total area = (22/7)*(25+144) = (22/7)* 169 = (22/7)* 13²

= (22/7)*(26/2)²

Dia of new plate = 26 cm



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