QuestionJAMBGeneral Maths1987ObjectiveExpressions, formulae & change of subjectCommercial arithmeticExpressions, formulae & change of subject, Commercial arithmetic
The formula Q=15+0.5n gives the cost Q (in naira) of feeding n people for a week. Find, in kobo, the extra cost of feeding one additional person.
Worked solution (try it first)
In
Q=15+0.5n, each extra person increases
n by 1, so
Q goes up by 0.5.
The cost is in naira: ₦0.50, and ₦1 is 100 kobo, so this is 50k, option D.
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