WAEC - Mathematics (1989 - No. 23)
What angle represents grown up girls ? Correct to one decimal place
37.5o
26.7o
25.7o
20o
3.75o
解释
Total population = 1400 + 550 + 200 + 150 + 400 = 2700
grown up girls = 200
= \(\frac {200}{2700}\) x \(\frac {360}{1}\)
=80/3 = 26.7°
grown up girls = 200
= \(\frac {200}{2700}\) x \(\frac {360}{1}\)
=80/3 = 26.7°