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Earlier discussion
2 older comments kept for context.
David john
I love this past question I want to pass this my examination waec.
Oluwaseun Adeyemi
Angle of sector subtended by yam
= 360\(^{\circ}\) - (70 + 80 + 50)\(^{\circ}\)
= 360\(^{\circ}\) - 200\(^{\circ}\)
= 160\(^{\circ}\)
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