The pie chart shows the monthly expenditure pf ... - JAMB Mathematics 1998 Question

The pie chart shows the monthly expenditure pf a public servant. The monthly expenditure on housing is twice that of school fees. How much does the worker spend on housing if his monthly income is N7200?

Let the monthly expenditure on school fees be x let the monthly expenditure on housing be 2x; angle of housing and school fee in a pie chart = 360^o - (120^o + 90^o)

= 360^o - 210^o = 150^o

Angle of housing in a pie-chart = (\frac{2}{3}) x 150 = 100

(\frac{100}{360}) x 7200 = N2,000