C-05-Q109mediumsingle_mcq

Shahik bought some pens for Tk. $240$ . With one more pen for the same money the price per pen would be Tk. $1$ less. Number of pens bought is—

a $12$
b $14$
c $15$
d $16$

ব্যাখ্যা

If $x$ pens cost Tk. $240$ , the price per pen is $\frac{240}{x}$ ; with $x+1$ pens it becomes $\frac{240}{x+1}$ , which is Tk. $1$ less. Solving $\frac{240}{x}-\frac{240}{x+1}=1$ gives $x=15$ .

এই অধ্যায়ের আরও প্রশ্ন

C-05-Q110In question 109, the equation in (number of pens) is—
C-05-Q111Why is rejected in question 109?
C-05-Q112In an exam, total marks of students in mathematics is . With one new student scoring added, the average drops
C-05-Q113Solving the equation in question 112 gives —
C-05-Q114Average marks of the original students in question 112 is—
C-05-Q115After adding the new student in question 112, the new average is—
C-05-Q116Assuming as the variable in , the degree of the equation is—
C-05-Q117Which of the following is an identity?
C-05-Q118The two roots of are—
C-05-Q119Coefficient of in is—

Equations in One Variable — সব প্রশ্ন দেখুন (170টি) →

Shahik bought some pens for Tk. $240$ . With one more pen for the same money the price per pen would be Tk. $1$ less. Number of pens bought is—

12

14

15

16

ব্যাখ্যা

If $x$ pens cost Tk. $240$ , the price per pen is $\frac{240}{x}$ ; with $x+1$ pens it becomes $\frac{240}{x+1}$ , which is Tk. $1$ less. Solving $\frac{240}{x}-\frac{240}{x+1}=1$ gives $x=15$ .

Shahik bought some pens for Tk. 240240240. With one more pen for the same money the price per pen would be Tk. 111 less. Number of pens bought is—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

Shahik bought some pens for Tk. 240240240. With one more pen for the same money the price per pen would be Tk. 111 less. Number of pens bought is—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

Shahik bought some pens for Tk. $240$ . With one more pen for the same money the price per pen would be Tk. $1$ less. Number of pens bought is—

Shahik bought some pens for Tk. $240$ . With one more pen for the same money the price per pen would be Tk. $1$ less. Number of pens bought is—