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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #33307)