Which Indian cricketer is known as "Brown Bradman"?
Who was the first female prime minister of the Republic of India, who served for three consecutive terms from...........
The Australian species of what bird has the longest beak in the world?
In which Shakespeare play does the character Autolycus appear?
In 1961 US President John F Kennedy negotiated for the release of the 1,189 survivors out of 1,500 men directed.........
"Degras" is what?
Skeleton bobsled, or cresta or tobogganing, was an Olympic sport in the 1948 Games, but not again until when?
What resin, often used as food flavouring and for medicine, is currently drawn from the trees of various Styrax.........
What is the technical term for talc?
James Scott, 1st Duke of Monmouth, declared himself King and was crowned in Chard and in Taunton in 1685................
A man drive his car to the office at 20 km/hr.
After reaching office, he realize that its a new year holiday so he went back home at a speed of 30 km/hr.
Discounting the time spent in the stoppage what was his average speed of the journey ?
Answer is 24.
we can calculate it using Harmonic Mean
average speed = (2 x 20 x 30) / (20 + 30) = 1200 / 50 =24.
let distance between home and office is 20 km
then total distance =20+20=40km
total time = 1+2/3=5/3 hours
average speed =total distance/total time
average speed of car=(2*20*30)/50
v=s/t => v = 40km/(5/3)h => v = 24km/h
Early one morning a family travelled to a shopping centre at 35 km/h.
After a day of Christmas shopping they returned, over exactly the same distance, at a crawl of only 14 km/h.
What was their average speed over the entire journey?
A coach covers its outward journey at 50 mph.
It returns, over exactly the same distance at 33.3333 mph.
What is the average speed of the coach over the entire journey?
A racing driver drove around a 6 km track at 140 km/hr for 3 km, 168 km/hr for 1.5 km and 210 km/hr for 1.5 km.
What was his average speed for the entire 6 km?
A helicopter covers its outward journey at 330 mph.
It returns over exactly the same distance at 220 mph.
What is the helicopter's average speed over the entire journey?
On a journey, across Bangalore, a cab averages 12 kmph for 60% of the distance, 15 kmph for 20% of it and 30 kmph for the remainder.
What is the average speed for the whole journey?
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