Question

1/8 part of pencil is black, 1/2 part of the remaining is white. if the remaining part of the pencil is blue and the length of this blue part is 7/2 cm. find the length of the pencil. with simple solution
(a) 6 (b) 7(c)8 (d) 9cm​

Answer 1

Hey mate the answer will be

Option b) 7

Answer 2

${\boxed {\pink {\bigcirc{answer}}}}$

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

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

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

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

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

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

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

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

HOPE IT'S HELPS YOU ❣️