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06 Nov 2020, 06:45
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (01:46) correct
22%
(02:01)
wrong
based on 64
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In a Country X, temperature decrease (in degrees) is linearly related to percentage increase in sale of water heaters and is given by the relation:
ΔT= ky + 5
Where,
ΔT is temperature decrease (in degrees).
y is the increase in sale of water heaters (in percentage).
K is a constant.
A temperature decrease of 10 degrees results in a 1% increase in sale of water heaters. What would be the percentage increase in sale of water heaters when temperature decreases by 15 degrees?
A. 1.5%
B. 2%
C. 2.5%
D. 3%
E. 3.5%
ΔT= ky + 5
Where,
ΔT is temperature decrease (in degrees).
y is the increase in sale of water heaters (in percentage).
K is a constant.
A temperature decrease of 10 degrees results in a 1% increase in sale of water heaters. What would be the percentage increase in sale of water heaters when temperature decreases by 15 degrees?
A. 1.5%
B. 2%
C. 2.5%
D. 3%
E. 3.5%
06 Nov 2020, 07:03
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HI!
I think i got the answer right however i would like to know this line meaning interpretation "y is the increase in sale of water heaters (in percentage)." will we substitute value y as 1/100 as it says "in percentage" OR should the value y will be in percentage as in only 1.
I think i got the answer right however i would like to know this line meaning interpretation "y is the increase in sale of water heaters (in percentage)." will we substitute value y as 1/100 as it says "in percentage" OR should the value y will be in percentage as in only 1.
06 Nov 2020, 08:22
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priyanka nath
Hello priyanka nath. Since it says y is in percentage, then we directly take the percentage value. We do not need to divide by 100.
The given data is 10 degrees decrease, which results in a 1% increase in sales. With this we can calculate k
10 = k + 5
Therefore k = 5
When decrease is 15 degrees, then 15 = 5y + 5
5y = 10
y = 2%
Option B
Arun Kumar
