A 40 g mixture at 100°C is mixed in 150 ...

A 40 g mixture at 100°C is mixed in 150 g of cold water. The temperature of final mixture is 50°C. What was the initial temperature of cold water?

A

`36.66^(@)`C

B

`26^(@)` C

C

`25.6^(@)`C

D

`35^(@)`C

Verified by Experts

The correct Answer is:

A

Heat taken = given heat
`150 xx 1 xx (50 - t) = 40 xx 1 xx (100 - 50)`
`rArr 760 - 15t = 200`
`rArr 15t = 550`
`t = 36.66^(@)` C

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