Question

8. A cistern can be filled by one tap in 2 1/2hours and by another in 3 3/4hours

to fill, if they are opened together?​

Answer 1

Answer:

3 hr

Step-by-step explanation:

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Answer 2

Answer:

time taken by 1st tap = 2 & 1/2 hr = 2hr 30 min

time taken by 2nd tap = 3 & 3/4 hr = 3hr 75 min

if both are opened together:

= tap 1 - tap 2

= 2hr 30 min - 3hr 75 min

= 1 hr 15 min