The speed of the motorboat in still water is 45 kmph. If the motorboat travels 80 km along the stream in 1 hour 20 minutes, then the time taken by it to cover the same distance against the stream will be: 

If 12 men can do a piece of work in 24 days, then in how many days can 18 men do the same work?

0.1 and   $${5\over 8}$$ of a bamboo are in mud and water respectively and the rest of length 2.75 m is above water. What is the length of the bamboo? 

x-y=2, xy=24, then the value of (x²+y²) is:

A man borrows some amount at the rate of 12% per annum at simple interest. After 6 years 8 months, he paid 720 as an interest. Find the amount borrowed by him. 

3 years ago, the ratio of Maya’s and Shikha’s age was 5:9 respectively. After 5 years, this ratio would become 3:5. Find present age of Maya?

If the two hands in a clock are 3 minutes divisions apart, then the angle between is

Which of the following is largest fraction amongst $$ {5\over8}$$, $$ {3\over7}$$, $$ {2\over9}$$,  $$ {4\over5}$$?