Question

A train travels 112 km in 1 hour 20 minutes with a certain speed. How many kilometres will it travel in 4 hours 45 minutes with the same speed? (2 marks)

Answer 1

Distance covered and time are varying directly to each other

So, $\frac{Dis\tan c{e}_1}{Tim{e}_1}=\frac{Dis\tan c{e}_2}{Tim{e}_2}$

Considering

Distance1 = 112 km

Time1 = 1 hr 20 min = 80 min

Distance2 = d

Time2 = 4 hr 45 min = 285 min

(1 mark)

$\frac{112}{80}=\frac{d}{285}d=\frac{112\times 285}{80}d=399km$

(1 mark)