If it has rained 276 mm in the last 3 days, how many mm of rain will fall in one full week? Assume that the rain continues to fall at the same rate.
644 mm
Rain in 3 days = 276 mm
Rain in 1 day = 2763 = 92 mm
Rain in 7 days = 92 × 7 = 644 mm
Thus, the rain in 7 days is 644 mm.