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Start learning 50% faster. Sign in nowDownstream speed of the boat = 210/10 = 21 km/hr Upstream speed of the boat = 160/8 = 20 km/hr Speed of boat in still water = (21 + 20)/2 = 20.5 km/hr Distance travelled by the boat in still water in 6 hours = 6 × 20.5 = 123 km
The average age of a group of 12 students is 32 years. Two persons of age 40 years and 31 years, left the group and 2 persons of age 54 years and...
The average of marks obtained by 50 candidates was 56. If the average of the passed candidates was 60 and that of the failed candidates was 50, then th...
The average of 35 numbers is 50. If 5 is added to each number, then the new average will be:
In an examination the average marks of Rohit is 60. If he got 19 more marks in science and 26 more marks in maths then his average would have been 65. F...
In a company, the average age of 40 employees is 20 years. When the ages of two managers, one 'a' years old and the other 'a + 10' years old, are includ...
Ajay on his birthday distributed on an average 9 toffees per student. If on the arrival of the teacher and the headmaster to whom Ajay gave 16 and 22 to...
The average of five even numbers is 64. If we replace two of these even numbers, 84 and 92, with a single even number X, the new average decreases by 4....
Piyush bought 18 notebooks for Rs.1220 from shop A and 14 notebooks for Rs.860 from shop B. What is the average price he paid per book?
The average age of a group of 10 students is 30 years. Two persons of age 25 years and 30 years, left the group and 2 persons of age 54 years and...
