Question

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Q.12. The cost of $3\frac{1}{2}$ kg wheat is 63. How much will $1\frac{1}{4}$ kg wheat cost.

Answer 1

Dear student,


$$\begin{gathered} Costof3\frac{1}{2}kgor\frac{7}{2}kgofwheat=Rs63 \\ Costof1kgofwheat=Rs\frac{63}{\frac{7}{2}}=Rs\frac{63\times 2}{7}=Rs\frac{126}{7} \\ Costof1\frac{1}{4}kgor\frac{5}{4}ofwheat=Rs\frac{126}{7}\times \frac{5}{4} \\ =Rs18\times \frac{5}{4} \\ =Rs9\times \frac{5}{2} \\ =Rs\frac{45}{2} \\ =Rs22.5 \\ thusthe\cos tof1\frac{1}{4}kgor\frac{5}{4}ofwheat=Rs22.5 \end{gathered}$$

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