The pie chart shows the monthly expenditure of 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 ₦7,200?
Worked solution (try it first)
Transport is marked with a right angle, so it is 90∘.
Housing and School fees share 360∘−120∘−90∘=150∘.
Housing is twice School fees, so split 150∘ in the ratio 2:1: Housing gets 32×150∘=100∘.
Housing costs 360100×7200=2000, so the worker spends ₦2,000, option B.