wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The width of a US letter is 5 × 10−1 mm.
A pack of US letters have a width of 10m.
How many US letters are there in the pack?
  1. 20000

Open in App
Solution

The correct option is A 20000
The width of a US letter = 5 × 101 mm.
A pack of US letters have a width of 10m.

You know, 1m =1000mm=10×10×10 mm=101×101×101 mm=101+1+1 mm [ ax×ay=ax+y ] = 103mm

Width of the pack of the US letters can be written as:10m =10×1 m=10× 103 mm=101+3 mm [ ax × ay=ax+y ] =104 mm

∴ Number of US letters in the pack will be
1045×101=104(1)5=104+15 [ axay=axy ]=1055=101+1+1+1+15=10×10×10×10×105=2×10×10×10×10=20,000

So, the number of US letters in the pack will be = 20000.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Extrema
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon