Mahesh school was 450 m from his home. He goes by cycle at the speed of 10 km/hr. He stopped at a stationary shop for 15 minutes. What is the total time travelled?

Question

$\begin{array}{11} (a)\; \text{45 minutes} \\ (b)\; \text{60 minutes} \\ (c)\; \text{30 minutes} \\ (d)\; \text{40 minutes} \end{array}$