If the family expends Rs. 750 per month on food, what is the annual expenditure of this family on education?

Here as per graph food expenditure , 40% = Rs. 750 per month
⇒ 10% = 10 x 750/40 = Rs. 187.50 per month
As per graph 10% is the expenditure on education.
∴ Annual expenditure (12 months) of the family on education = 187.50 x 12 = Rs. 2250