Question

If 4/5 of a cistern is filled in 1 min , how much more time will be required to fill the rest of it

Answer 1

Hy...
Friend........ .
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Here your solution
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Let the cistern fill fully in x minutes.

In 1 minute ====== 4/5 cistern
In x minutes ====== 1 cistern

USING PROPORTIONALITY METHOD,

1 : 4/5 :: x : 1

Product of means = Product of extremes

1 × 1 = 4/5 × x

1 = 4/5 of x

=> x = 5/4 minutes

1 minute = 60 seconds
=> 5/4 × 60
=> 75 seconds

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ANSWER = 75 seconds OR 1 minute 15 seconds
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Thankyou

Answer 2

Heyy!!



Let the cistern fill fully in x minutes.

In 1 min=4/5 cistern
In x min= 1 cistern

USING PROPORTIONALITY METHOD,

1 : 4/5 :: x : 1

Product of means = Product of extremes

1 × 1 = 4/5 × x

1 = 4/5 of x

=> x = 5/4 minutes

1 minute = 60 seconds
=> 5/4 × 60
=> 75 seconds


✌Hope it helps❤♥