Question

A journey of $540$ km is completed in $7$ hours $30$ minutes. If two-third of the journey is completed at $80$ km/hr, at what speed is the remaining journey completed ?

• A. $60$ km/hr.
• B. $30$ km/hr.
• C. $20$ km/hr.
• D. $40$ km/hr.

Answer 1

The correct option is A $60$ km/hr.

$540$ km journey takes $7$ hours $30$ minutes.

Two -Third of the journey $=$ $\frac{2}{3}\times 540=360$ km

Time taken $=\frac{360}{80}=4$ hours $30$ minutes.

Remaining time $=7-4=3$ hours

Remaining Distance $=540-360=180$ km

Speed $=\frac{180}{3}=60$ km/hr