# A 60-litre tank was full of oil. Sam used 40%of it and poured the rest into a 40 litre tank. 1) What per cent of the 40-litre tank was filled with oil? 2) If Sam used 3 litres of oil daily, what per cent of oil in the 40 litre tank would be used in 10 days?

2
by parthdeepakvarma

2016-03-12T19:52:04+05:30

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Capacity of 1stTank =60 litres.
Amount of oil used by Sam=40% of 60 litres.
=(40/100)*60 litres.
=24 litres.
Amount of oil left = (60 - 24) litres
= 36 litres.
Acc. to Question, Amount of oil that was left, was poured in 2nd tank with capacity 40 litres.
Now,
Percentage of  oil in 2nd tank=(36/40)*100 %
= 90 %. (1st Part Answer)
Now if 3 litres of oil is being used daily,
Amount of oil used in 10 days = (3*10)=30 litres.
Amount of oil left in the tank = (36-30) = 6 litres.
Now percentage of oil in tank = (6/40)*100 %
=15%
∴Percentage of oil left in tank = (100 - 15)% = 85% (2nd Part Answer)
2016-03-14T14:30:58+05:30
1) Tank has amount of oil
= 60 litre
Sam used 40% of it
= 60×40/100
= 24.
Sam used = 60-24
= 36
Sam poured it into 40 litre tank.
The percentage of oil in 40 litre tank
= 36×100/40
= 90%

2) If Sam used 3 litre oil daily means in 10 days
= 3×10
= 30
Water in 40 litre tank = 36 litre
Percentage= 30×100/36 = 250/3
= 83_1/3