hey pls answer this question .
very urgent..!!
first and correct answer to be marked as brainliest.
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Time taken by first tap to fill a tank alone = 10 hrs
Time taken by second tap to fill the tank alone= 5 hrs
First + second tap 1 hour's work = 1/10+1/5 = 1+2/10 = 3/10
First tap 1 hour's work = 1/10
First tap 2 hours' work = 2/10 = 1/5
Now, amount of work left = 1 - 1/5 = 4/5
Now, second tap is opened.
Time taken by both the to fill the tank together = 10/3 hrs
Time taken by both the taps to fill45 of the tank together = 10/3 ×4/5 = 8/3 hours
Hence time needed to fill the tank = 2 + 8/3 = 14/3 hours = 14/3×60 min = 280 min = 4 hours 40 min
Time taken by second tap to fill the tank alone= 5 hrs
First + second tap 1 hour's work = 1/10+1/5 = 1+2/10 = 3/10
First tap 1 hour's work = 1/10
First tap 2 hours' work = 2/10 = 1/5
Now, amount of work left = 1 - 1/5 = 4/5
Now, second tap is opened.
Time taken by both the to fill the tank together = 10/3 hrs
Time taken by both the taps to fill45 of the tank together = 10/3 ×4/5 = 8/3 hours
Hence time needed to fill the tank = 2 + 8/3 = 14/3 hours = 14/3×60 min = 280 min = 4 hours 40 min
arshdeep1805:
Thanks
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