Question

Cost of 4 dozen Bananas is Rs. 180. How many bananas can be purchased in Rs.90

Answer in a whole process and I will give a heart and mark as brainliest
​

Answer 1

Given:

• Cost of 4 dozen bananas = Rs. 180

To find:

→ Number of bananas that can be purchased for Rs. 90

Solution:

According to the question,

We know that:

1 dozen = 12 bananas

4 dozen bananas = 4 × 12 = 48 bananas.

Now,

48 bananas = Rs. 180

x bananas = Rs. 90

Taking proportion,

48 : 180 :: x : 90

Product of means = Product of extremes

⇒ 180(x) = 90 × 48

⇒ 180x = 90 × 48

⇒ 180x = 4320

⇒ x = 4320 ÷ 180

∴ x = 24 bananas

So, 24 bananas can be purchased for Rs. 90

Know more:

• This question can be solved by unitary method also i.e by dividing and finding out the cost of 1 banana and then multiplying to find out how many bananas can be purchased for Rs 90.
• This method would not give us the exact answer. So we took proportion.

Answer 2

${ \bf \pink✽ { \underline{\underline{GiVeN}}} \green✽}$

• Cost of 4 dozen Bananas ↠Rs 180

══════ •『 ♡ 』• ══════

${ \bf \pink✽ { \underline{\underline{To \: FinD}}} \green✽}$

• Number of Bananas that can be purchased in ↠Rs 90

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${ \bf \pink✽ { \underline{\underline{NoTe}}} \green✽}$

• 1 dozen ⇢ 12 units

══════ •『 ♡ 』• ══════

${ \bf \pink✽ { \underline{\underline{SoLuTioN}}} \green✽}$

We know ,

ㅤㅤㅤㅤㅤ1 dozen⇢ 12 units

ㅤㅤㅤㅤㅤ4 dozen⇢12 × 4 units

ㅤㅤㅤㅤㅤㅤㅤㅤㅤ⇢ 48 units

$\small \sf \therefore Number \: of \: Bananas \: purchased \: for \: Rs \: 180↬48$

$\small \sf \therefore Number \: of \: Bananas \: purchased \: for \: Rs \: 1↬ \frac{48}{180}$

$\small \sf \therefore Number \: of \: Bananas \: purchased \: for \: Rs \: 90↬ \frac{48}{18 \cancel0} \times 9 \cancel0$

$\small \sf \implies Number \: of \: Bananas \: purchased \: for \: Rs \: 90↬ \frac{48} {\cancel{18}} \times \cancel 9$

$\small \sf \implies Number \: of \: Bananas \: purchased \: for \: Rs \: 90↬ \cancel\frac{48}{2}$

$\small \sf \implies Number \: of \: Bananas \: purchased \: for \: Rs \: 90↬24$

══════ •『 ♡ 』• ══════

• $\sf\therefore$ 24 Bananas can be purchased for Rs 90

══════ •『 ♡ 』• ══════

${ \bf \pink✽ { \underline{\underline{ExploRe \: MoRe}}} \green✽}$

Unitary method:-

• The unitary method is a method in which you find the value of a unit and then the value of a required number of units.

For example:-

• 20 Bananas ⇢ Rs 100

• 1 Banana ⇢ Rs 100/ 20

ㅤㅤㅤㅤㅤㅤ⇢ 50

• 5 Bananas ⇢ 50 × 5

ㅤㅤㅤㅤㅤㅤㅤ⇢250

══════ •『 ♡ 』• ══════

$\\ \bigstar{ \underline{ \underline \pink{ \sf★@iTzShInNy☆}}} \bigstar$

══════ •『 ♡ 』• ══════