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a tap supplies water at 26oC while another supplies water at 82oC. If a man...

Physics
WAEC 1991
a tap supplies water at 26oC while another supplies water at 82oC. If a man wishes to bathe with water at 40oC the ratio of hot mass of hot water to that of cold water required is
  • A. 1:3
  • B. 3:1
  • C. 3:7
  • D. 7:3
  • E. 15:8
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Correct Answer: Option A
Explanation
heat supplied by hot water = heat gained by cold water M1C(82 - 40) = M2C(40 - 26)

\(\frac{M_2}{M_1}\)= \(\frac{14}{42}\)

= 1: 3
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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