A boy is late by 9 minutes if he walks to school at a speed of 4 km/hour. If he walks at the rate of 5 km/hour, he arrives 9 minutes early. The distance to his school is
A9 km
B5 km
C6 km
D4 km
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Related Questions:
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ആദ്യ 2 മണിക്കൂറിൽ കാറിൻ്റെ വേഗത മണിക്കൂറിൽ 30 കിലോമീറ്ററും അടുത്ത 2 മണിക്കൂർ മണിക്കൂറിൽ 40 കിലോമീറ്ററുമാണ്. അപ്പോൾ കാർ സഞ്ചരിച്ച ആകെ ദൂരം?
A girl goes to school at a speed of 10 km/hr. She comes back with a speed of 40 km/hr.
Find her average speed for the whole journey.