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02 Feb 2026, 03:26
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
71% (01:51) correct
29%
(02:11)
wrong
based on 80
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At her usual jogging speed of r kilometers per hour, Melanie burns 15 calories per minute. If she ran 10 kilometers yesterday at her usual jogging speed, how many calories did she burn while jogging yesterday?
A. 9000/r
B. 15000/r
C. 1500/r
D. 900/r
E. 150/r
A. 9000/r
B. 15000/r
C. 1500/r
D. 900/r
E. 150/r
poojaarora1818
Joined: 30 Jul 2019
Last visit: 20 May 2026
Posts: 1,634
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Location: India
Concentration: General Management, Economics
Schools: Duke '27 Haas '27 Kelley '27 Kellogg '27 McDonough '27
GPA: 3
WE:Human Resources (Real Estate)
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02 Feb 2026, 07:12
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Solution:
Given : Speed = r km per hour
Distance = 10 km
Calories burnt = 15 calories per minute (900 per hour)
By applying the matrix approach we get the time
In one hour = 900 calories
\( \frac{10}{r} \)hour= \(\frac{9000}{r}\)
Hence, Option A
Given : Speed = r km per hour
Distance = 10 km
Calories burnt = 15 calories per minute (900 per hour)
By applying the matrix approach we get the time
| Speed | Time | Distance |
| r | \(\frac{10}{r}\) | 10 |
In one hour = 900 calories
\( \frac{10}{r} \)hour= \(\frac{9000}{r}\)
Hence, Option A
kevincan
