A tap supplies water at 25oC while another ..

Question 1 Report

A tap supplies water at 25oC while another supplies water at 75oC. If a man wishes to bathe with water at 40oC, the ratio of the mass of cold water to the mass of hot water required is

1 : 3

15 : 8

7 : 3

3 : 1

Answer Details

Heat lost = heat gained

mh x c x (75 - 40) = mc x c x (40 - 25)

$\frac{m_{h}}{m_{c}}$ = $\frac{35}{15}$

= $\frac{7}{3}$

Read lesson note on Heat Energy (WAEC)

Heat Energy

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A tap supplies water at 25oC while another supplies water at 75oC. If a man wishes to bathe with water at 40oC, the ratio of the mass of cold water to the m...