Question

If 1/8 of a pencil is black,1/2 of the remaining is white and the rest 7/2cm is blue,find the total length of the pencil.

Answer 1

Answer:

Add the given lengths of the pencil to get the actual length of the pencil.

Step-by-step explanation:

Black portion = 1/8

White portion = 1/2

Blue portion = 7/2

The total length of the pencil is the sum of all the portions.

That is,

1/8+ 1/2 +7/2

L. C. M = 8

1/8 + 4/8+ 28/2

33/8

Therefore, the length of the pencil is 33/8cm

Answer 2

${\boxed {\orange {\bigstar{answer}}}}$

$\small \purple{let \: assume \: length \: of \: the \: pencil \: is \: x}$

$\small \red{as \: per \: que. \: portion(length) \: of \: black \: in \: pencil} = \frac{x}{8}$

$remaining \: portion = x - \frac{x}{8} = \frac{7x}{8}$

$so \: white \: portion = \frac{1}{2} \times \frac{7x}{8} = \frac{7x}{16}$

$so \: remaining \: portion = \frac{7x}{8} - \frac{7x}{16} = \frac{7x}{16}$

$\green{as \: per \: question}$

$\frac{7x}{10} = 3.5$

${\fcolorbox{pink}{white}{x = 8cm}}$

HOPE IT'S HELPS YOU ❣️