Maths

(c): A + B + C = 12540 .… (1)

$A=\frac{3}{7}(B+C)$

$\frac{A}{B+C}=\frac{3}{7}$

So, A's Share = $\frac{3}{10}*12540=3762$ $\frac{}{}$

$B=\frac{2}{9}(A+C)$

$\frac{B}{A+C}=\frac{2}{9}$

So, B's Share = $\frac{2}{11}*12540=2280$

(c):Let x be the percentage of water in the resultant mixture.

Using the alligation rule, we have

$\frac{30}{25}=\frac{(40-x)}{(x-20)}$

6 (x – 20) = 5 (40 – x)

6x – 120 = 200 – 5x

11x = 320

x = $\frac{320}{11}=29.09\mathrm{\%}$

(b):Vande Bharat takes 6 hours from New Delhi to Bhopal. Duronto takes 4 hours from Bhopal to New Delhi. Let the distance between Delhi and Bhopal be 'd' kms.

Speed of Vande Bharat = $\frac{d}{6}km/hr$ $$

Speed of Duronto = $\frac{d}{4}km/hr$ $$

They will meet after = $\frac{d}{\frac{d}{6}+\frac{d}{4}}=2\frac{2}{5}hours$ $$

= 2 hours & 24 minutes

Hence, required time = (7 + 2.24)

= 9 : 24 a.m.

Factorised from = 2⁴ * 3⁴ * 5² * 7²

Total no. of factor = 5* 5 * 3 * 5

= 225 factors

113^rd factor = $\sqrt[]{N}$

 i.e. 7 * 5 * 3² * 2² = 1260

150/- wax; 8.5/- thread; 12.5/- coloured paper; 9/- silver powder

Profit = 40%.

Net input = 150 + 8.5 + 12.5 + 9 = 180/-

Net profit = 180 * .4 = 72/-

$$ $\frac{1}{2}$  the candles = $\frac{}{}$ $\frac{1}{2}$   (180) = 90/-

At 50% profit = 45.

90 + 45 = 135/-

Let the remaining $\frac{1}{2}$ $\frac{}{}$ = x

Net price = (72 + 180) = 135 + x

x = 117

Profit on second $\frac{1}{2}$ $\frac{}{}$ = 117 – 90 = 27

$\frac{}{}$ $\frac{27}{90}*100$  = 30%

P (1.05)2 − P = 369 or P = 3600

$\frac{x}{5}+\frac{x}{6}$ = CP (x oranges of each type) = $\frac{11x}{30}$  and SP =  $\frac{2x}{7}$

On selling 2x oranges, loss = $\frac{x}{5}+\frac{x}{6}-\frac{2x}{7}=\frac{17x}{210}$

If loss is 34, Total oranges =  $\frac{2x*34}{\left(\frac{17x}{210}\right)}=840$