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If y varies directly as the square root of x and y = 3 when...

Mathematics
JAMB 2010

If y varies directly as the square root of x and y = 3 when x = 16. Calculate y when x = 64

  • A. 12
  • B. 6
  • C. 3
  • D. 5
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Correct Answer: Option B
Explanation

y ∝ √x
y = K√x
K = y/√x = 3/√16
= 3/4
y = 3/4√x
= 3/4√64 when x = 64
= 3/4 x 8/1
= 6

There is an explanation video available below.


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Explanation Video

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Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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