The expenditure on road, school and water supply are in the ratio 7 :15 :2. if the expenditure of road in gh 2,800. a find the expenditure on I. school ii water supply. b. what is the budget for these three projects? c. the cost of maintaining libraries is gh90. 00 and this is met from the expenditure on schools. what percentage, correct to 3 Significant figures of the expenditure on school is spent on maintaining libraries.