8th Class
Mathematics
Related to Competitive Exam
Question Bank
Arithmetic
question_answer
If the cost of printing a book of 380 pages with 20 lines on each page and on an average 11 words in each line is Rs.19, then the cost of printing a book with 280 pages 22 lines on each page and 10 words in each line is
A)Rs.14
B)Rs.16
C)Rs.18
D)Rs.20
Correct Answer:
A
Solution :
No. of Pages
No. of lines
No. of words
cost
380
20
11
19
280
22
10
x
all are in direct variation \[16+T=18\] \[{{T}_{1}}=3years\]