Question
A car is traveling at a speed of 144 km/hr. The car's
tires have a diameter of 70 m. How long will it take for the car to complete 12 revolutions of its tires?Solution
ATQ, Speed of the tyre = 144 × (5/18) = 40 m/s Circumference of the tyre = 2πr = 2 × (22/7) × (70/2) = 220 metres Time taken by the tyre to make 12 revolution = 12 × (220/40) = 66 seconds
The mean proportion of 324 and 225 is:
A sum of money is divided among P, Q, R and S in the ratio of 3:4:8:9 respectively. If the share of R's is Rs. 2900 more than the share of Q, then what ...
What is the fourth proportional to 2, 5, 12?
Ratio of males to females in village ‘A’ and village ‘B’ is 4:5 and 19:20, respectively and number of females in village ‘B’ is 25% more tha...
- If the mean proportion of 1.21 and 0.25 is 'k', then find the value of '10k'.
Marks scored by A and B in a test are in the ratio 12:5 respectively. If B had scored 5 more marks, then marks scored by A would be 20% more than that o...
A sum of ₹12,000 is divided among A, B, and C in the ratio 3:4:5. If A and B donate 25% and 20% of their shares respectively to a charity, how much mo...
A sum of money is divided among P, Q, R and S in the ratio of 1:2:5:6 respectively. If the share of R's is Rs. 2850 more than the share of Q, then what ...
- Initially, a bag contains t-shirts of two colours (yellow and green) in the ratio of 7: 15 respectively. If 19 yellow t-shirts and 11 green t-shirts were d...
Before a battle the ratio of tanks to planes in an army was 5 : 3. During the war 1000 tanks were destroyed and 800 planes were destroyed. The ratio of ...
Relevant for Exams:
