6th Class Mathematics Ratio and Proportion

  • question_answer 23) If it has rained 276 mm in the last 3 days, how many centimetre of rain will fall in one full week (7days)? Assume that the rain continues to fall at the same rate.


                    Here, the number of days is known and rain fall is unknown. Given, rainfall in 3 days = 276 mm \[\therefore \] Rainfall in 1 day \[=\frac{276}{3}=92mm\] \[\therefore \]Rainfall in one full week i.e. 7 days  \[=92\times 7=644mm\] In centimetre, rainfall in one full week \[=644\times \frac{1}{10}cm=64.4\,cm\]\[\left[ \because 1mm=\frac{1}{10}cm \right]\] Hence, 644 mm or 64.4 cm rain will fall in 7 days or one full week.

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