$2\mathrm{.}5$ Repeat Problem $2\mathrm{.}3$ with the following data.

US sieve no$.$

Mass of soil retained on each sieve $($g$)$

$4$

$28$

$10$

$42$

$20$

$48$

$40$

$128$

$60$

$221$

$100$

$86$

$200$

$40$

Pan

$24$

HIDE ANSWER

$$ Answer:

b$.$ D$60=0\mathrm{.}42$ mm; D$30=0\mathrm{.}27$ mm ;

D$10=0\mathrm{.}14$ mm

c$.$ Cu $=3$

d$.$ Cc $=1\mathrm{.}24$