Explanation

Explanation

According to the question, Bachal is now three times as old as his son,

so, x = 3y

five years before their ages would have been, x-5 and y-5. And the question says the Bachal was four times as old as his son,

x-5 = 4( y -5)

x-5= 4y -20

x-4y + 15 = 0

3y - 4y + 15 =0 , we already know x = 3y

y = 15 and x = 45

The Bachal is presently 45 and the son is 15

Explanation

Explanation

Equilateral Triangle Three equal angles, always 60

all sides are of equal length (equilateral), and all  angles are right angles. 

A triangle that has no equal sides and no equal angles is known as a Scalene Triangle

while 

if two sides of a triangle are of equal length, then it is called. Isosceles triangle

Explanation

let the maximum marks be x

Candidate A score = 20% of x

= 20/100 (x)

=> x/5a

Candidate fails by 50 marks

Hence , candidate would have passed if 50 marks are added to his marks :

x/5 +50 => (x+250)/5

Now, score of Candidate B

40% of x

=> 40/100 (x) =>2x/5

A.T.Q

2xs/5 - 30

=> (2x-150)/5

both the equations are equal as both the equations justify minimum passing marks

Hence, (x+250)/5 = (2x-150)/5

cancelling 5 from both sides

x+250 = 2x - 150

x = 400

Explanation

Speed              =distance/time

=>speed          = (600/300) x (18/5)

                                    =7.2 km/hr

Explanation

CP = 50,00,000

P% = 5%

Profit = 5%of 5000000

5/100*5000000 = 2,50000

Therefore profit is 2,50000

Explanation

Explanation

Explanation