WAEC - Mathematics (2012 - No. 14)
The curved surface area of a cylindrical tin is 704cm2. If the radius of its base is 8cm, find the height. [Take \(\pi = \frac{22}{7}\)]`
14cm
9cm
8cm
7cm
ব্যাখ্যা
Curved surface area = 2\(\pi h\)
704 = 2 x \(\frac{22}{7} \times 8 \times h\)
704 = \(\frac{352}{7}\)h
352h = 704 x 7
h = \(\frac{704 \times 7}{352}\)
= \(\frac{4928}{352}\)
h = 14cm
704 = 2 x \(\frac{22}{7} \times 8 \times h\)
704 = \(\frac{352}{7}\)h
352h = 704 x 7
h = \(\frac{704 \times 7}{352}\)
= \(\frac{4928}{352}\)
h = 14cm