WAEC - Mathematics (2007 - No. 54)
Two circles have radii 16cm and 23cm. What is the difference between their circumference? take \(\pi = \frac{22}{7}\)
422.92cm
149.92cm
44.00cm
43.96cm
Объяснение
r = 16, R = 23; 2\(\pi R - 2 \pi r\)
= 2\(\pi(R - r)\)
= 2 x \(\frac{22}{7} (23 - 16)\)
= 2 x \(\frac{22}{7} \times (7)\)
= 44cm
= 2\(\pi(R - r)\)
= 2 x \(\frac{22}{7} (23 - 16)\)
= 2 x \(\frac{22}{7} \times (7)\)
= 44cm