A closed tin of milk has diameter 10cm and height 16cm. Find the total surface area of the tin. (Take πt to be 22÷7) and make the subject of the formula

2 answers

Total surface area = 2πr(r + h)

= 2(22/7)(5)(5 + 16)

= 2(22/7)(5)(21)

= 2(22/7)(105)

= 440 cm²
AAAaannndd the bot gets it wrong yet again!

how can the math be good until just the final step?
so screwed up ...