Question
A frustum of a square pyramid has base edges of 10 cm
and 6 cm, and a height of 8 cm. What is its volume? Calculate approximate valueÂSolution
Volume of a frustum of a square pyramid = (1/3)h(a² + b² + ab) = (1/3) * 8 * (10² + 6² + 10*6) = (1/3) × 8 × (196) = (8×196)/3 = 1568/3 = 522.66 cm or 523 cm³ Answer: (C)
When a number is increased by 30% then the number obtained is 34 less than thrice the original number. Find the original number.
When the digits of a two-digit number are interchanged, the new number becomes 8 less than 150% of the original number. If the sum of the digits is 7, f...
S1 is a series of 5 consecutive multiples of 3 and S2 is a series of 4 consecutive multiples of 8. If the ratio of 3rd to 2nd terms in S1 is 6:5 and in ...
- How many numbers in the range from 50 to 500 are divisible by 3, 6, and 9?
There are three natural numbers which are pairwise co-prime. The product of the first two numbers is 105 and the product of the last two numbers is 255....
 Find the range of the given data:
18, 23, 36, 41, 55, 12, 62, 50, 48
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...
When a least four-digit number 'x' is divided by 120, 100, and 80, it leaves a remainder of 15 in each case. What least number must be added to 'x' so t...
A certain number gives a remainder of 8 when divided by 17. What will be the remainder when four times that number is divided by 17?