Question

Respected answer this question : from a roll of curtain cloth , 9 curtains each of length 4 metres can be cut. If the curtains needed are of 3 metres long. How many curtains can be made out of this cloth.
A train can finish a journey in 10 hrs travelling at a speed of 56 km/ h. If another faster train is to cover the same journey in 8 hrs. What should be the speed of the new train?

Answer 1

$$\begin{gathered} \mathrm{Hi}, \\ \mathrm{Second}\mathrm{question}, \\ \mathrm{first}\mathrm{train}\mathrm{can}\mathrm{cover}\mathrm{a}\mathrm{distance}\mathrm{with}\mathrm{speed}56\mathrm{kmph}\mathrm{in}10\mathrm{hours} \\ \mathrm{so}\mathrm{distance}=\mathrm{speed}\times \mathrm{time} \\ =56\times 10=560\mathrm{km} \\ \mathrm{another}\mathrm{faster}\mathrm{train}\mathrm{cover}\mathrm{this}\mathrm{distance}\mathrm{of}560\mathrm{km}\mathrm{in}8\mathrm{hour} \\ \mathrm{so}\mathrm{speed}\mathrm{of}\mathrm{this}\mathrm{train}=\frac{\mathrm{distance}}{\mathrm{time}}=\frac{560}{8}=70\mathrm{km}/\mathrm{h} \end{gathered}$$