Question

A boy reads 3/7 pages of book on first day and 2/5 on second day, if he did not read 30 pages,how many pages did he read on first day

Answer 1

Step-by-step explanation:

I've explained it step by step in the picture

Really hope it helps... :-)

Answer 2

$Let \: total \: number \:of \: pages = x$

$Number \: pages \: read \: on \: first \:day \\= \frac{3x}{7}$

$Number \: pages \: read \: on \: second\:day \\= \frac{2x}{5}$

$Number \: pages \: unread = 30$

/* According to the problem given */

$x - \Big( \frac{3x}{7} + \frac{2x}{5}\Big) = 30$

$\implies x - \Big( \frac{15x+14x}{35} \Big) = 30$

$\implies x - \frac{29x}{35} = 30$

$\implies \frac{35x - 29x}{35} = 30$

$\implies \frac{6x}{35} = 30$

$\implies x = 30 \times \frac{35}{6}$

$\implies x = 5 \times 35$

$\implies x = 175$

$Now, Number \: pages \: read \: on \: first \:day \\= \frac{3x}{7}\\= \frac{ 3 \times 175}{7}\\= 3 \times 25\\= 75$

Therefore.,

$\red{Number \: pages \: read \: on \: first \:day} \\\green { = 75 }$

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