Skip to content
Philoid
Browse Saved
Back to chapter
Maths
9. Commercial arithmetic
Home · Class 8 · Maths · Ref. Book · 9. Commercial arithmetic
Prev
Next
Q2 of 59 Page 147

A time interval of 3 minutes and 20 seconds is wrongly measured at 3 minutes and 25 seconds. What is the percentage error?

Given: Actual Value = 3 minutes and 20 seconds = 200 seconds and Observed Value = 3 minutes and 25 seconds = 205 seconds


Error = Observed Value – Actual Value


Error= 5 seconds




More from this chapter

All 59 →
1

The time in which simple interest on a certain sum be 0.15times the principal at 10% per annum is:

1

The principal that yields a simple interest of ₹ 1,280 at 16%per annum for 8 months is:

3

Hari reads 22% of the pages of a book on the first day, 53% on the second day and 15% on the third day. If the number of pages remaining to be read is 30, find the total number of pages in the book.

4

If 55% of students in a school are girls and the number of boys is 270, find the number of girls in the school.

Questions · 59
9. Commercial arithmetic
1 2 3 4 5 1 2 3 4 5 6 1 2 3 4 5 1 2 3 4 1 2 3 4 5 1 2 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Back to chapter
ADVERTISEMENT
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved