What is the average speed of a car which covers half the distance with a speed of 28 km/h and the other half with a speed of 84 km/h?
A42km/h
B38km/h
C43km/h
D39km/h
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
How many seconds will a boy take to run one complete round around a square field of side 87 metres, if he runs at a speed of 3 km/h?
Two trains, one 152.5 m long and the other 157.5 m long, coming from opposite directions crossed each other in 9.3 seconds. The combined speed of the two trains every hour would then be:
A person can complete a journey in 9 hours. He covers the first one-third part of the journey at the rate of 35 km/h and the remaining distance at the rate of 28 km/h. What is the total distance (in km) of his journey?
15 km/hr വേഗത്തിൽ സഞ്ചരിക്കുന്ന ഒരാൾ ഒരു പാലം 3 മിനിറ്റ് കൊണ്ട് കടന്നാൽ പാലത്തിന്റെ നീളം ?
A man covers three equal distances first at the rate of 10 km/hr, second at the rate of 20 km/hr, and third at the rate of 30 km/hr. If he covers the third part of the journey in 2 hours. Find the average speed of the whole journey.