3.0cm
3.5cm
4.0cm
4.5cm
Correct answer is B
Using V = \(\frac{3}{1} \pi r^2h\),
so, 38\(\frac{1}{2} = \frac{1}{3} \times \frac{22}{7} \times r^2 \times 3\)
\(\frac{77}{2} = \frac{22}{7} \times r^2\)
r2 = \(\frac{77 \times 7}{2 \times 22}\)
r2 = \(\frac{49}{4}\)
Hence, r = \(\sqrt{\frac{49}{4}}\)
= 3\(\frac{1}{2}\)
A car dealer bought a second-hand car for 250,000 and spent N 70,000 refurbishing it. He then s...
In the diagram, find the size of the angle marked a° ...
When a dealer sells a bicycle for N81 he makes a profit of 80%. What did he pay for the bicycle? ...