Question

Sarita bought $\frac{2}{5}$ meter of ribbon and Lalita $\frac{3}{4}$ meter of ribbon. What is the total length of the ribbon they bought?

Answer 1

Given : Sarita bought $\frac{2}{5}$meter of ribbon

Lalita bought $\frac{3}{4}$meter of ribbon

Total length of the ribbon bought by both of them = $\frac{2}{5}+\frac{3}{4}$

$$\begin{gathered} =\left[\frac{(2\times 4)+(3\times 5)}{20}\right][\mathrm{LCM}\mathrm{of}5\&4=20] \\ =\frac{(8+15)}{20} \\ =\frac{23}{20}meter \end{gathered}$$

Hence, total length of the ribbon that they bought is $\frac{23}{20}meter$