A man can row at 10 km/hr. in still water. If the velocity of current is 2 km/hr. and it takes him 10 hours to row to a place and come back, how far is the place?
Speed downstream = (10 + 2) = 12 km/hr.
Speed upstream = (10 - 2) = 8 km/hr
.Let the required distance be x km.
Then, x/12 + 1/8 = 10.
=> (2x+3x)/24 = 10.
=> 5x =10 $\times$ 24.
=> x = 48 km.
|
In a secondary school the seats for Maths, physics and social studies are in the ratio 8: 5: 7. there is a proposal to increase these seats by 75%, 40% and 50% respectively. What will be the new ratio? |
Answer |
|
Mr. Kaushik invested an amount of Rs. 13,900 divided in two different schemes A and B at the simple interest rate of 14% per annum and 11% per annum respectively. If the total amount of simple interest earned in 2 years be Rs. 3508, what was the amount invested in Scheme B? |
Answer |
|
A and B can together finish a work 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the work? |
Answer |
|
Microsoft Logical Reasoning Test: Coding/Decoding:In a certain code language, FUNNY is coded as NFYUN then how will u code the word GREEN? |
Answer |
|
Coding/Decoding: If JOSEPH is coded as FKOALD, then GEORGE will be coded as: |
Answer |
|
Distance & Direction: I walk 30 meters in North-West direction from my house and then 30 meters in South-west direction. After this I walk 30 meters in South-East direction. Now, I turn to my house, in what direction am I going? |
Answer |
|
Distance & Direction Village Q is to the North of the village P. The village R is in the East of Village Q. The village S is to the left of the village P. In which direction is the village S with respect to village R? |
Answer |
|
Blood Relationships: Introducing Sonia, Amir says, "She is the wife of only nephew of only brother of my mother." How Sonia is related to Amir? |
Answer |
|
Blood Relationships: Pointing to a boy in the photograph Reena said, "He is the only son of the only child of my grandfather." How Reena is related to that boy? |
Answer |
|
Critical Reasoning: The cost of producing radios in Country Q is ten percent less than the cost of producing radios in Country Y. Even after transportation fees and tariff charges are added, it is still cheaper for a company to import radios from Country Q to Country Y than to produce radios in Country Y.The statements above, if true, best support which of the following assertions? |
Answer |