Rajesh wants to buy some peanut butter at the grocery store, where he is offered two options. State,

Question

Rajesh wants to buy some peanut butter at the grocery store, where he is offered two options.

State, with clear workings, which option has better value for money.

Assume Rajesh chooses Option B and consumes a fixed amount of peanut butter every day.

If it takes exactly $30$ days to use up all the peanut butter he buys, find the amount of peanut butter Rajesh consumes every day.
If Rajesh consumes $13.5$ g peanut butter every day instead, find the number of days after which all the peanut butter is used up. Find the least whole number of days by the end of which it is completely used up.

Accepted Answer

(i) Option B at approximately $0.0288$ dollars per gram, compared with $0.0300$ dollars per gram for Option A (ii) $15\text{ g}$ per day (iii) $34$ days

Ratio and Rate

Ratio and Rate

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