Question

A truck travelling with $\frac{4}{5}$ of its actual speed covers 56 km in 1 hr 45 mins. What is the actual speed of the truck?

• A. 25 kmph
• B. 35 kmph
• C. 15 kmph
• D. 40 kmph
• E. None of these

Answer 1

The correct option is D

40 kmph

Let the actual speed of the truck be $xkmph$

$\therefore$ $\frac{4x}{5}=\left(\frac{56}{1+\frac{3}{4}}\right)$

$\Rightarrow x=\frac{56}{7}\times 4\times \frac{5}{4}$

$\Rightarrow x=40kmph$