Question
A person covers the first 288 km at a speed of 64 km/h,
then travels the next 220 km at a speed of 40 km/h, and finally completes the remaining 288 km at a speed of 48 km/h. What is the average speed of the person for the entire journey?Solution
Total distance travelled = 288 + 220 + 288 = 796 km Total time taken = 288/64 + 220/40 + 288/48 = 4.5 + 5.5 + 6 = 16 hours Average speed = 796/16 = 49.75 km/h
If detA = 3, detB = 2, then det(AB) =?If sin x + sin 2x = 1 and cos x + cos 2x = 0, find x.
5, 24, 47, 76, 113, ?.
- What is a hierarchical, decentralized system used to name computers, services, or resources on the internet or private networks?
A group of 20 boys can complete a task in 15 days. Similarly, 24 girls can finish the same task in 20 days. If the ratio of the e...
27, 28, 30, 34, 42, ?
A circle with radius 5 units is inscribed in a square. What is the area of the square?
A and B initiated a business by investing Rs. 6,000 and Rs. 3,000, respectively. Their investments were made for 8 months and 'm'...
A basket contains 4 yellow balls, 10 green balls, and 6 white balls. If two balls are taken out one after another without putting the first one back, fi...
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between x and y and choose the...
Relevant for Exams:
