Question
A man travelled a total distance of 250 km. He travelled
first 100 km on car with a speed of 20 km/h and rest of the distance on bike whose speed is 10 km/h less than that of the car. Find his average speed for the whole journey.Solution
Total time taken to cover the whole journey = 100/20 + 150/10 = 5 + 15 = 20 km Desired average speed = 250/20 = 12.5 km/h
Determine the smallest possible value of 'P' that makes the eight-digit number '4423P456' fully divisible by 3.
A = (9/4) × B and C = (1/12) × A. If (A + B + C) = 300, then find the value of (12C – B).
Find the value of 'a' in the given data if the mean of the given data is 27.
20, 25, 30, 28, 26, 24, a, 29, 22, 23
There are balls of three colours: blue, green, and white. The number of green balls is 8 more than the average number of balls of each colour. The numbe...
A farmer has 1457 cows and 3055 buffaloes. He wants to graze them in minimum number of groups in such a way that each group has only one type of animal ...
- What is the sum of digits of the maximum 3-digit number that leaves 5 as remainder when divided by 10, 15, and 12?
a, b and c are three integers. The sum of a and b is 61. If b is divided by a then the quotient is 2 and the remainder is 7. If cn - 2 is lar...
Which pair of these numbers is cop rime?
Find the sum of all natural numbers less than 1,000 that are divisible by both 3 and 5 but not by 7.
- 35% of 45% of 640 = z + 20.2, what is the sum of the squares of the digits in ‘z’?
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