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lozanna [386]
3 years ago
7

a cylindrical tank is a diameter of 14 m and a height of 3.5 m find the capacity of the water tank in litres​

Mathematics
1 answer:
sergey [27]3 years ago
6 0

v=pi.r^2.h

v=3.14×7×7×3.5

v=538.51 cubic meter

1cubic meter=1000 litre

so v=538510 litre

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evablogger [386]
Given:
Total number of pieces: 117
watch = x
earrings = four times as many earring as watches = 4x
necklaces = half the number of necklaces as earrings = 1/2 * 4x = 2x
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x + 4x + 2x + 2x = 117
9x = 117
x = 117/9
x = 13

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earrings: 4x = 4(13) = 52
necklaces: 2x = 2(13) = 26
bracelets: 2x = 2(13) = 26

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x^2+(10^2-2(10)(2x)+(2x)^2)=25\\x^2+100-40x+4x^2=25\\5x^2-40x+75=0\\x^2-8x+15=0\\(x-5)(x-3)=0\\\\x=5\\x=3

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