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An electric kettle has two heating coils...

An electric kettle has two heating coils. When one of them is switched on water in it boils in 6 minutes and when other is switched on water boils in 4 minutes. In what time will the water boil if both coil are switched on simultaneously

A

1.6 min

B

2.8 min

C

2.4 min

D

3 min

Text Solution

Verified by Experts

The correct Answer is:
C
`t_(S)=t_(1)+t_(2),t_(P)=(t_(1)t_(2))/(t_(1)+t_(2))`
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