A certain distance was covered by a car at a speed of 60 km per hour and comes back at the speed of 36 km per hour . What is the average speed of the car ?
A30 Km/hr
B40 Km/hr
C45 Km/hr
D48 Km/hr
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A delivery boy started from his office at 10 a.m. to deliver an article. He rode his scooter at a speed of 32 km / h. He delivered the article and waited for 15 minutes to get the payment. After the payment was made, he reached his office at 11:25 a.m., travelling at a speed of 24 km / h. Find the total distance travelled by the boy.
ന്യൂഡൽഹിയിലേക്കുള്ള ഒരു ട്രെയിൻ ഓരോ 50 മിനിറ്റിലും ഒരു റെയിൽവേ സ്റ്റേഷനിൽ നിന്ന് പുറപ്പെടുന്നു. ഒരു അന്വേഷണ ഉദ്യോഗസ്ഥൻ ഒരാളോട് പറഞ്ഞു,ട്രെയിൻ 20 മിനിറ്റ് മുമ്പ് പുറപ്പെട്ടു. അടുത്ത ട്രെയിൻ 10 : 25 am. ന് പുറപ്പെടും എന്ന് ഏത് സമയത്താണ് ആ വ്യക്തിക്ക് വിവരം നൽകിയത്?
A man travelling at a speed of 20 km/hr, reached his office 10 minutes late. Next day he travelled at a speed of 30 km/hr and he reached his office 10 minutes earlier. The distance between his office and home is :