JAMB - Mathematics (2006 - No. 7)

The pie chart above shows the expenditure of a family whose income is N30,000. If the expenditure on food is twice that on housing and that on school fees is twice that on transport, how much does the family spend on food?

N 28 000

N 25 500

N15 000

N 12 500

Giải thích

Expenditure on housing = x
Expenditure on food = 2x
Expenditure on school fees = 90^o
Expenditure on transport = 45^o
x + 2x + 90 + 45 = 360^o
3x + 135 = 360^o
3x = 360 - 135
3x = 225
x = 225/3 = 75^o
∴∠ for food = 2x = 2 * 75
= 150
360^o = N30,000
1^o = ?
1^o = 30,000/360
150^o = (30000/360) * (150/1)
= N12500

JAMB - Mathematics (2006 - No. 7)

Giải thích

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