Q12 of 31 Page 251

Cost of a dozen pens is Rs. 180 and cost of 8 ball pens is Rs. 56. Find the ratio of the cost of a pen to the cost of a ball pen.

It is given in the question that,


Cost of dozen of pens = Rs. 180


Therefore,


Cost of 1 pen =


= Rs. 15


Also,


Cost of a ball pen =


= Rs. 7


Therefore,


Required ratio =


=


More from this chapter

All 31 →
10

In a college, out of 4320 students, 2300 are girls. Find the ratio of:

(a) Number of girls to the total number of students.


(b) Number of boys to the number of girls.


(c) Number of boys to the total number of students.

 11

Out of 1800 students in a school, 750 opted basketball, 800 opted cricket and remaining opted table tennis. If a student can opt only one game, find the ratio of:

(a) Number of students who opted basketball to the number of students who opted table tennis.


(b) Number of students who opted cricket to the number of students opting basketball.


(c) Number of students who opted basketball to the total number of students.

 13

Consider the statement:

Ratio of breadth and length of a hall is 2:5. Complete the following table that shows some possible breadths and lengths of the hall.
















Breadth of the hall (in metres)



10







40



Length of the hall (in metres)



25



50






 14

Divide 20 pens between Sheela and Sangeeta in the ratio of 3 : 2