4 / 5 of a cistern is filled in 1 hour . how long will it take to fill the cistern ?
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4 / 5 of a cistern is filled in 1 hour . how long will it take to fill the cistern ?
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Answer:
5/4 hour
Step-by-step explanation:
4/5 is filled in 1 hour
1 will fill in 5/4 hours
Hope it helps
Verified answer
Answer:
1 hour 15 min
Step-by-step explanation:
let time fill cistern be x
4/5 × x=1
x=5/4hours
=5/4×60min
=75 min
= 1hour 15 min