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2 years ago

7

a total of 600 books were labelled A,B,C and D.Given that 1/4 of the book is labelled A and 3/10 of the book is labelled B.There

are 15 books labelled C.Calculate the number of books labelled D.

1 answer:

Marizza181 [45]2 years ago

5 0

Answer:

255 is the answer........

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$\text {Volume of a sphere =} \dfrac{4}{3} \pi r^3$

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$\pi r^3 = 140 \times \dfrac{3}{4}$

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Find volume of the cylinder :
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$\text {Volume of the cylinder = } \pi r^2h$

$\text {Volume of the cylinder = } \pi ((3.22)^2(3.22 \times 2)$

$\text {Volume of the cylinder = } 209.77 \ cm^3$

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Find volume of the gap :
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$\text {Volume of gap = } 209.77 - 140$

$\text {Volume of gap = } 69.77 \ cm^3$

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$\bf \text {Answer : } 69.77 \cm^3$
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