Numerical Problems - II — task. Science State Board, Class 9.

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1. Find the thickness of a five rupee coin with the screw gauge, if the pitch scale reading is 1 $mm$ and its head scale coincidence is 68.

Solution:

From the data given,

Pitch scale reading (

$PSR$ )

$=$ 1

$cm$

Head scale coincidence (

$HSC$ )

$=$ 68

Let us consider,

Least count (

$LC$ )

$=$

$mm$

The formula to calculate the thickness of the coin,

Answer variants:

$\pm$

$-$

$\times$

HSC

PSR

$+$

$Thickness = i i (i i i) i i$

Substitute the values in the formula,

Thickness of the ball :

$mm$

$1$

Did you find an error?

16. Numerical Problems - II