If price of x amount oil was 100

Then, now it is 100+331/3 = 1331/3

Housewife used to spend 100 for x amount of oil.

1331/3  is the price of x amount

100 is the price of x*100/1331/3 

                            = x*100*3/400

                            = 3x/4

Must reduce (x- 3x/4)

                   = (4x-3x)/4

                   = x/4

    &nbs 

a2 = 729

a = 27

Then, Perimeter = 4a = 4*27 = 108

In 12 days, A and B can do 1 job.

In 1 day, A and B can do 1/12 job.

Again,

In 20 days, A can do 1 job

In 1 day, A can do 1/20 job

Thus, In 1 day, B alone can do (1/12 - 1/20) job

                                       = (10-6)/120 job

                                       = 4/120 job

                                       = 1/30 job

Now,

(x2-x+2)/2=4

or, (x2-x+2)=8

or, x2-x-8+2=0

or, x2-x-6=0

or, x2-3x+2x-6=0

or, x(x-3)+2(x-3)=0

or, (x-3)(x+2)=0

or, x=3 or, x=-2

The working variables in the sequence is the two digits at a time. Thus,

1 and 2 is the first variable.

1-1=0; 0-1=-1; Similarly, -1-1=-2

2+1=3; 3+1=4; Similarly, 4+1=5

The next number after 4 would be -2.

Mithu is (21-1) or, 20 Person away from Rank 1.

If, He must be 20 person away from 65th person, he would be (65-20)th or 45th person.

L+2=N,    N+2=P,

p+1=q,    q+1=r,

F+1=G,    G+1=H,

In this way,

R+2=T

s+1=t

I+1=J

Ans: T t J

Today is (Saturday -3-1) = Monday

Yesterday is = Sunday

Two days before= Suday -2 = Friday

From, Pythagoras Theorem,

x2 = 42+32

x2 =  16 + 9

x2 =  25

x = sq rt (25)

x = 5

Again,

y2 = 42+32

y2 =  16 + 9

y2 =  25

y = sq rt (25)

y = 5

Let the CP be Tk. 100. So, SP is Tk. 110. The new CP is Tk. 80. So the new SP =140%(80)= Tk. 112 So the difference of SP’s = Tk. 2. Now, if the difference is 2, CP is 100 So, when the difference is 10, the CP is (100 * 10 / 2) taka

                                                            = 500 taka

Selling price =100% - 30% = 70% of cost price.

New selling price = 2*70% of cost price = 140% of the cost price

Profit = 140% – 100% = 40% of cost price.

Graph

superficial- ভাসা ভাসা জ্ঞান, profound- গভীর 

durable- টেকসই 

exonerated - দোষমুক্ত করা 

cursory - দ্রুত