Question
The average rainfall in a city for the first 7 days of a
month is 12 mm per day. To have an average of 20 mm per day over 14 days, what should be the average rainfall in the remaining days?Solution
ATQ,
Total rainfall required = 20 × 14 = 280 mm
Rainfall in 7 days = 12 × 7 = 84 mm
Required rainfall = 280 - 84 = 196 mm
Required average rainfall in remaining days = 196 ÷ 7 = 28 mm per day
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