⟩ Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40mins. If all of them work together, find the time taken to fill the tank?
17 1/7 mins.
17 1/7 mins.
Find the right number, from the given options, at the place marked by the question mark 2, 4, 8, 32, 256, ?
A moves 3 kms east from his starting point . He then travels 5 kms north. From that point he moves 8 kms to the east.How far is A from his starting point?
After the typist writes 12 letters and addresses 12 envelopes, he inserts 1 letter per envelope randomly into the envelopes. What is the probability that exactly 1 letter is inserted in an improper envelope?
A candidate appearing for an examination has to secure 40% marks to pass paper I. But he secured only 40 marks and failed by 20 marks. What is the maximum mark for paper I?
The cost of one pencil, two pens and four erasers is Rs.22 while the cost of five pencils, four pens and two erasers is Rs.32.How much will three pencils, three pens and three erasers cost?
How many 5 digit numbers can be formed using the digits 1, 2, 3, 4, 5 (but with repetition) that are divisible by 4?
If A is traveling at 72 km per hour on a highway. B istraveling at a speed of 25 meters per second on a highway.What is the difference in their speeds in m/sec?
A person, who decided to go to weekend trip should not exceed 8 hours driving in a day. Average speed of forward journey is 40 m/h. Due to traffic in Sundays, the return journey average speed is 30 m/h. How far he can select a picnic spot?a) 120 milesb) Between 120 and 140 milesc) 160 miles
1/3 of a number is 3 more than 1/6 of the same number. What is the number?
Suppose Jalia is twice older than qurban. If Jalia was 4 years younger, qurban was 3 years older, the diff. between their ages is 12 years?