Explanation

There are n cows: 
First son gets: 2n​

Second son gets: 4n​

Third son gets: 5n​

Fourth son gets: 7 cows

Therefore, sum of cows each son gets equals the total number of cows
2n​+4n​+5n​+7=n
7=20n​
n=140

Explanation

x + 5x + 10x = 640

16x = 640

x = 40

∴ no. of notes = 40×3=120

Explanation

Let A be the amount of type of first rice and

B be the Amount of second type of rice

According to question:  A + B = 50 Kg

Also

                           A  x 4.5 + B x 5 = 240 Rs

Thus solving the above two equations

                    (50 – B) x 4.5 + 5B = 240

                       225 – 4.5 B + 5B = 240

                                          0.5 B = 15

                                                 B = 15/ 0.5

                                                 B = 30 Kg

                                        Thus A = 50 – 30 = 20 Kg

Explanation

1163​=1619​  Its reciprocal=1916​
∴ Required difference=1619​−1916​
=304361−256​=304105​

Explanation

Value of x is 100

Because 6250/10=625.

Explanation

15+5+0+12+8/5

=40/5

=8

Explanation

If both pipes are opened for 3 minutes then water taken out=(12l*3)+(40/3l*3)=36l+40l=76l

Water left in tank=240l-76l=164l

Explanation

4 TESTS AVERAGE IS 60. SO IF WE SUM THE TOTAL VALUE THEN

60*4=240

5 TESTS AVERAGE IS 58.SO IF WE SUM THE TOTAL VALUE THEN

58*5=290.

THEN TAKE THE DIFFERENCE OF SUM YOU GET

290-240= 50.

Explanation

Explanation

60x5 = 300