Question
Two parallel wires of length 10 cm each are separated by
a distance of 0.5 cm in a liquid. If the distance between them is increased by 2 mm, how much work is done? (Surface tension = 72 dyne/cm)Solution
W=T×ΔA ΔA=2×length×Δd Substituting values: W=72×2×10×0.2=288 ergs
A factory produces three types of products: A, B, and C. The ratio of the number of units produced for A, B, and C is initially 3:4:5. After a revision ...
Suresh spends 30% of his monthly salary on travel, 40% of the leftover on food, and saves the remaining amount. If he saves Rs. 1680, find out how much ...
- When 120 is added to a number, it becomes 250% of that number. Find 20% of the original number.
During a test, Rahul managed to get 38% and missed the cutoff by 16 marks, while Sneha got 45% and scored 5 marks above the passing marks. What was the ...
Divakar spends 30% of his salary on house rent, 20% of the remaining amount on shopping, 25% of the remaining on education fees, and the rest is divided...
- Rajesh spent 15% of his income on savings and out of the remaining amount, he spent 40% on bills, 30% on groceries, 10% on transportation, and saved Rs. 18...
The only expenses of Arun are on grocery, rent and fun expenses. Arun spent Rs. 5,000 on fun, amount spent by him on rent is Rs. 9,000 more than that on...
Income of A is 65% of the Income of B and A together. The saving of B is 20% of his Income and equals to Rs. 1400. Find the difference between the incom...
In a department 20% of the employees are females. 40% of the male employees know Hindi. The total number of employees who know Hindi is 46%. Find the pe...
In an assembly election, a candidate got 60% of the total valid votes. 2% of the total votes were declared invalid. If the total number of voters is 126...
Relevant for Exams:
