Question
What is the purpose of piston rings in an
engine?Solution
Piston rings prevent gas leakage, reduce friction, and control oil distribution within the cylinder.
Ashish bought 25 notebooks for Rs.1230 from shop A and 12 notebooks for Rs.805 from shop B. What is the average price he paid per book?
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....
P, Q, R, S and T are five persons. The weight of P, Q and R is 80%, 102% and 84% respectively of the average weight of all five. The ratio of weight of ...
- Three varieties of pulses priced at Rs. 28/kg, Rs. 32/kg, and Rs. ‘x’/kg are mixed in the ratio 4:3:5. If the final mixture is worth Rs. 33 per kg, the...
- The average marks of Karan in 5 different papers was calculated as 73. But it was later found that his marks in two subjects were wrongly entered as 80 and...
The average price of two books, namely 'X' and 'Y' is Rs. 850 whereas the average price of books 'Y' and 'Z' is Rs. 910. If the average price of book 'X...
The average age of a class of 20 girls is 16 years. If 4 new girls having average age of 10 years join the class, then the average age of the class beco...
The average of 30 numbers was initially calculated as 45. However, it was later found that one of the numbers had been incorrectly recorded as 83 instea...
The average expenditure of a man for the first 9 month is Rs.5000 and for the next 3 months is Rs.8000. If he saves 12000 in that year then find his ave...
- David Warner has an average score of 82 runs in 140 innings. The highest runs scored by him in an innings exceed his lowest score by 210 runs. If the runs ...
