Question 9 Find: (i) The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high. (ii) How much steel was actually used, if 112 of the steel actually used was wasted in making the tank? [Assume π=227]

Question 9 Find: (i) The lateral or curved surface area of a closed cy

1.	Question 9 Find: (i) The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high. (ii) How much steel was actually used, if 112 of the steel actually used was wasted in making the tank? [Assume π=227]
Answer» Question 9 Find: (i) The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high. (ii) How much steel was actually used, if $\frac{1}{12}$ of the steel actually used was wasted in making the tank? $[A s s u m e π = \frac{22}{7}]$