Question

Please write the correct answer guys if the answer is correct I will mark u as brainliest if it is correct only i will mark as brainliest i promise

Answer 1

Sᴏʟᴜᴛɪᴏɴ 29 :-

Let us Assume that, Present salary of Ravi & Sumit are 2x & 3x Respectively .

So , when Their Salary is Increased by Rs.4000 each,

→ New salary or Ravi = (2x + 4000)

→ New salary or Sumit = (3x + 4000)

Now, it is Given That, Ratio of Their New Salary is 40:57.

So,

→ (2x + 4000) : (3x + 4000) = 40 : 57

→ (2x + 4000) / (3x + 4000) = 40 / 57

→ 57(2x + 4000) = 40(3x + 4000)

→ 114x + 57*4000 = 120x + 40*4000

→ 120x - 114x = 57*4000 - 40*4000

→ 6x = 4000(57 - 40)

→ 6x = 4000 * 17

→ 6x = 68000

→ x = Rs. 11333.33

Hence,

→ Before Salary of Sumit = 3x = 11333.33 * 3 = Rs.34,000

Therefore,

→ Present Salary of sumit = 34000 + 4000 = Rs.38,000 (Ans). (Option D) .

Note :- Option D is Wrongly written it is 38,000 not 38,0000.

__________________

Solution 30 :-

we know That :-

if a : b :: c : d

Than,

⇒ Product of extremes = Product of means

⇒ a x d = b x c

we have :-

→ 0.75 : x :: 5 : 8

So,

→ 0.75 * 8 = 5 * x

→ 5x = 6

→ x = (6/5)

→ x = 1.2 (Option B) (Ans.)

____________________

Answer 2

QUESTION 29 (Solution)

Let the salary of Ravi be 2x, and the salary of Sumit be 3x.

Given that, their salaries are increased by ₹ 4000.

⤳ So, new salary of Ravi = ₹2x + 4000

⤳ And new salary of Sumit = ₹3x + 4000

A/q,

The ratio of their new salaries is 40 : 57.

So, we get :

$\displaystyle{\sf{\frac{2x+4000}{3x+4000}=\frac{40}{57} }}$

$\textsf{Corss-multiplying:}\\\\\displaystyle{\sf{\implies 57(2x+4000)=40(3x+4000)}}$

$\displaystyle{\sf{\implies 114x + 228000=120x+160000}}\\\\\displaystyle{\sf{\implies 228000-160000=120x-114x}}\\\\\displaystyle{\sf{\implies 68000=6x}}\\\\\displaystyle{\sf{\implies x=\frac{68000}{6} }}\\\\\displaystyle{\sf{\implies x=11333.33}}$

Sumit's salary = 3x

⟿ Sumit's previous salary = 3 × 11333.33

⟿ Sumit's previous salary = ₹ 34,000

Now, the current salary of Sumit = 3x + 4000

⟿ Sumit's salary = 34,000 + 4000

⟿Sumit's salary = ₹ 38,000

The answer is (d) ₹ 38,000.            

(Its printed the wrong value. It is printed 380000 instead of 38000. Be careful about this.)

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QUESTION-30 (Solution)

Given,

0.75 : x :: 5 : 8

To find :-

The value of 'x'.

Solution :-

We know,

Product of means = Product of extremes

$\displaystyle{\sf{x\times5=0.75\times8}}\\\\\displaystyle{\sf{\implies 5x=6}}\\\\\displaystyle{\sf{\implies x=\frac{6}{5} }}\\\\\boxed{\displaystyle{\sf{\implies x=1.2}}}$

So, the value of x is (B) 1.2 .

$\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\ddot\smile}}}}}}$