Home / Aptitude Tests / Mathematics / The thickness of an ...

The thickness of an 800 pages of book is 18mm. Calculate ...

The thickness of an 800 pages of book is 18mm. Calculate the thickness of one leaf of the book giving your answer in meters and in standard form

A.

2.25 x 10-4m

B.

50 x 10-4m

C.

2.25 x 10-5m

D.

4.50 x 10-5m

Correct answer is D

Thickness of an 800 pages book = 18mm to meter

18 x 103m = 1.8 x 10-2m

One leaf = \(\frac{1.8 \times 10^{-2}}{800}\)

= \(\frac{1.8 \times 10^{-2}}{8 \times 10^{2}}\)

= \(\frac{-1.8}{8}\) x 10-4

= 0.225 x 10-4

= 2.25 x 10-5m

one leaf contains 2 pages

: 2 * 2.25 x 10\(^{-5}\)m

= 4.5 * 10\(^{-5}\)m