0.8-0.3 = 0.5 hours
2.4 * 0.5 = 0.3 times
x=4
Go downhill at a speed of 4 kilometers per hour.
Bottom circumference = height = height = 62.8cm.
If π=3. 14
The base diameter is 62.8/3. 14=20cm.
S total =(20/2)? * 3. 14+62.8 * 62.8 = 3943.84+3 14 = 4257.84cm?
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