Question
If a truck moves at a constant speed of 30 km/h for 1
kilometre and 45 km/h for the next 1 kilometre. What is the average speed of the truck?Solution
The average speed is calculated as follows: Total distance = 2 km Total time = 1 / 30+ 1/ 45 hours = 3/90+2/ 90 =5/90= 1/18 hours Average speed = 2 km/ (1/18) hours = 36 km/h So, the average speed is 36 km/h.
Simplify:
6x + 8y - [(12x + 6y) - (4x + 3y) + 2y] - 4xIf 9x2 + 16y2 = 24xy, then find the ratio of ‘x’ and ‘y’, respectively.
- Suppose [a + (1/16a)] = 3, then the value of [16a³ + (1/256a³)] is:
If, 6x + y = 20, and 2xy = 32, and 6x > y, then find the value of 216x³ – y³.
If x + 1/x = 2, find x⁷ + 1/x⁷.
(x – 6) 2 + (y + 2) 2 + (z – 4) 2 = 0, then find the value of 4x - 3y + z.
Three cubes of metal whose edges are 3cm, 4cm and 5cm. respectively are melted and a single cube is formed. What is the length of the edge of the newly ...
A number is increased by 20%, and the resulting number is decreased by 20%. If the initial number is ₹x, the final number is ₹2880. What is the valu...
Relevant for Exams:
