A large pizza has diameter 36 cm and a medium pizza has diameter 30 cm. What is the difference in area of the pizzas? Round your answer to t

Question

A large pizza has diameter 36 cm and a medium pizza has diameter 30 cm. What is the difference in area of the pizzas? Round your answer to the nearest square centimetre.

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Josie 1 week 2021-09-14T07:17:20+00:00 1 Answer 0

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    2021-09-14T07:19:01+00:00

    Answer:

    311 cm^{2}

    Step-by-step explanation:

    Taking a pizza to be a circle

    Area of big pizza be x abd are of small pizza be y

    hence difference = x-y

    Area of a circle = \pi r^{2} where r is the radius

    taking \pi to be 3.14

    hence area x = 3.14 (\frac{36}{2} *\frac{36}{2}) = 1017.36

    Area y = 3.14 (\frac{30}{2} * \frac{30}{2} )= 706.5

    x-y = 1017.36- 706.5 =310.86 cm^{2}

    310.86 cm^{2}

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45:7+7-4:2-5:5*4+35:2 =? ( )