Explanation

Let total income be = x
 after spending 20% of x he has = 10080​x

after spending 70% of remaining he has
=10030​×10080​x
10030​×10080​x=1800
x=241800×100​=300×25=7500

Explanation

At 5% loss. SP =Rs.95x100$=Rs.\frac{95x}{100}$

Now,95x100+80=105x100$Now,\frac{95x}{100}+80=\frac{105x}{100}$

=>105x100−95x100=80$=>\frac{105x}{100}-\frac{95x}{100}=80$

=>105x−95x100=80$=>\frac{105x-95x}{100}=80$

=>x=800010=Rs.800

Explanation

40% of 200

40/100*200

40*2

80

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

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

Using the formula for Required arithmetic mean =number of termssum of the terms​

After substituting the values we get=52+4+6+8+10​=530​=6

Explanation

Explanation

Length = 6m

Width = 5m

Height = 5m

Volume = L*W*H

=6*5*4

=120

Explanation