Today Puzzle #673
Puzzle No. 673 鈥� Tuesday 11 February
The government has announced sales of new petrol, diesel and hybrid cars will be banned in 2035. 2.3 million of these vehicles are currently sold each year compared with 60,000 zero emissions ones. If the same number of cars are sold each year, what annual growth rate in zero emissions car sales will be needed?
Today’s #PuzzleForToday has been set by Dr Shaun Fitzgerald, Fellow of Girton College
Click here for the answer
In order to achieve 2.36 million sales in 2035 (which is 15 years from now) from an annual base today of 60,000, the growth rate G can be determined by writing 2,360,000 = 60,000 x (1+G%)^15. We find that G=28% to the nearest percentage.
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