Question

High Order Thinking Skills (HOTS)
22. A 60-litre tank was full of oil. Sam used. 40%
of it and poured the rest into a 40 litre tank.
(i) What per cent of the 40-litre tank was filled
with oil ?
(ii) If Sam used 3 litres of oil daily, what per
cent of oil in the 40 litre tank would be
used in 10 days?
​Sorry gys subject chemistry likh Gaya h yai maths subject

Answer 1

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High Order Thinking Skills (HOTS)

A 60-litre tank was full of oil. Sam used 40% of it and poured the rest into a 40 litre tank.

• What per cent of the 40-litre tank was filled with oil ?
• If Sam used 3 litres of oil daily, what per cent of oil in the 40 litre tank would be used in 10 days?

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Sam used 40% of it and poured the rest into a 40 litre tank.

Sam used 3 litres of oil daily.

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What per cent of the 40-litre tank was filled with oil ?

If Sam used 3 litres of oil daily, what per cent of oil in the 40 litre tank would be used in 10 days?

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Sam used 40% of total oil of 60-litre tank.

40% of 60 ltrs

= ${\frac{40}{100}}×60$ltrs

= 24 ltrs

Remaining oil

= (60-24) ltrs

= 36 ltrs

So, 36 ltrs of oil was poured in 40-litre tank.

So, let the percentage be x%.

x% of 40 = 36

➳ ${\frac{x}{100}}$×40 = 36

➳ ${\frac{40x}{100}}$= 36

➳ 40x = 36 × 100

➳ 40x = 3600

➳ x = ${\frac{3600}{40}}$

➳ x = 90

So, 90% of the 40 litre tank is filled with oil.

Sam uses 3 ltrs of oil per day.

Oil used in 10 days

= (3 × 10) ltrs

= 30 ltrs

Let the percentage be y%.

y% of 36 = 30

➳ ${\frac{y}{100}}$×36 = 30

➳ ${\frac{36y}{100}}$= 30

➳ 36y = 30 × 100

➳ 36 = 3000

➳ y = ${\frac{3000}{36}}$

➳ y = 83${\frac{1}{3}}$

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• 90% of the 40-litre tank was filled with oil.
• If Sam used 3 litres of oil daily, 83${\frac{1}{3}}$% of oil in the 40 litre tank would be used in 10 days.

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Answer 2

Answer:

High Order Thinking Skills (HOTS)

A 60-litre tank was full of oil. Sam used 40% of it and poured the rest into a 40 litre tank.

What per cent of the 40-litre tank was filled with oil ?

If Sam used 3 litres of oil daily, what per cent of oil in the 40 litre tank would be used in 10 days?

GIVEN❥

Sam used 40% of it and poured the rest into a 40 litre tank.

Sam used 3 litres of oil daily.

TO FIND❥

What per cent of the 40-litre tank was filled with oil ?

If Sam used 3 litres of oil daily, what per cent of oil in the 40 litre tank would be used in 10 days?

SOLUTION❥

Sam used 40% of total oil of 60-litre tank.

40% of 60 ltrs

= {\frac{40}{100}}×60

100

40

×60 ltrs

= 24 ltrs

Remaining oil

= (60-24) ltrs

= 36 ltrs

So, 36 ltrs of oil was poured in 40-litre tank.

So, let the percentage be x%.

x% of 40 = 36

➳ {\frac{x}{100}}

100

x

×40 = 36

➳ {\frac{40x}{100}}

100

40x

= 36

➳ 40x = 36 × 100

➳ 40x = 3600

➳ x = {\frac{3600}{40}}

40

3600

➳ x = 90

So, 90% of the 40 litre tank is filled with oil.

Sam uses 3 ltrs of oil per day.

Oil used in 10 days

= (3 × 10) ltrs

= 30 ltrs

Let the percentage be y%.

y% of 36 = 30

➳ {\frac{y}{100}}

100

y

×36 = 30

➳ {\frac{36y}{100}}

100

36y

= 30

➳ 36y = 30 × 100

➳ 36 = 3000

➳ y = {\frac{3000}{36}}

36

3000

➳ y = 83{\frac{1}{3}}

3

1

THEREFORE❥

90% of the 40-litre tank was filled with oil.

If Sam used 3 litres of oil daily, 83{\frac{1}{3}}

3

1

% of oil in the 40 litre tank would be used in 10 days.

{࿐}}}DONE࿐

✿HOPE THIS HELPS YOU✿