It rained as much on Wednesday as on all others days of week combined. If average rainfall for whole

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It rained as much on Wednesday as on all the others days of the week combined. If the average rainfall for the whole week was $3 \,cm $ then how much did it rain on Wednesday? (in $cm$)

A

$2.625$

B

$3$

C

$10.5$

D

$15$

Solution

Let, the rainfall on Wednesday be $x \,cm$ so that on the other $6$ days, the total is also $x$.

Since average rainfall for the week $=3 \,cm$

$\therefore \quad x+x=3 \times 7 \quad$ or, $\quad x=10.5\, cm$

Standard 13

Quantitative Aptitude

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