Question on: JAMB Mathematics - 2014

Angle of sector subtended by yam

= 360^o - (70 + 80 + 50)^o

= 360^o - 200^o

= 160^o

But (\frac{80^o}{360^o}) x T = 8000

T = (\frac{8000 \times 360^o}{80^o})

= N36,000

Hence the amount spent on yam = (\frac{160^o}{260} \times N36,000)

= N16,000