1.

Two taps A and B can fill a tank in 10 minutes and 15 minutes respectively. In what time will the tank be full if tap B was opened 3 minutes after tap A was opened ?A. `4.2`B. `6.2`C. `7.2`D. `8.2`

Answer» Correct Answer - C
Remaining work after 3 minutes is `(7)/(10)`


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