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Gourab Swain

· started a discussion

· 1 Months ago

Wrong solution (Question:108040.2)

Beta ray=5/360 * 3600= 50 units per min

Question:
DIRECTIONS: Following questions are based on the pie-chart given below:


Constituents of sun rays received in 1 min.


Total Sunrays received in 1 min. = 3600 unit

How many minutes of exposure to the sun in a day would be enough to ensure that the body receives enough amount of vitamin D, given that the body 

requires 40 unit of vitamin D every day and that 30 unit of Beta rays generate in 1 unit of vitamin D?

Options:
A) \(5\cfrac{2}{3}\)
B) \(5\cfrac{1}{3}\)
C) \(6\cfrac{1}{3}\)
D) \(6\cfrac{2}{3}\)
Solution:
Ans: (d)

Beta rays in 1 minute = \(\cfrac{3600}{360}\times18=180\) unit

180 unit of Beta rays =\(\cfrac{1}{30}\times180=6\) unit of vitamin D

Now, 6 unit of vitamin D are generated in = 1 minute

Hence, 40 unit of vitamin D will be generated in

= \(\cfrac{1}{6}\times40=6\cfrac{2}{3}\) minutes

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