Question
Nine cubes with each side measuring 3 cm are aligned in
a straight row to build a cuboid. What is the total surface area of the resulting cuboid?Solution
ATQ,
Length = 9 × 3 = 27 cm
Breadth = 3 cm
Height = 3 cm
Total surface area = 2 × (27 × 3 + 3 × 3 + 3 × 27)
= 2 × (81 + 9 + 81) = 2 × 171 = 342 cm²
The average weight of 15 boys in a group is 48 kg. If the collective weight of 12 girls in another group is 25% lower than that of the boys, what is the...
The average expenditure of a man for the first 4 month is Rs.4000 and for the next 8 months is Rs.6000. If he saves 11000 in that year then find his ave...
- The average of series 'S8', which consists of 6 consecutive even numbers, is 35. The second term of series 'T8', which consists of 5 consecutive odd number...
In an examination, the average marks obtained by the students is 40. After correcting the quantitative mistakes, the average of 50 students is reduced t...
60% of 3840 +? + 30% of 4380 = 40% of 8340 + 10% of 3480
The average of three numbers is 21. The first number is double the second, and the third number is double the first. Calculate the sum of the first and ...
The ages of 5 children are 6, 8, 10, 12 and 14 years. Find their average age.
The average weight of ‘x’ group members is 56 kg. The average weight of (x – 18) women is 55 kg, of (x – 20) children is 50 kg, and of (x – 22...
In an election between two candidates, the winner secured a victory margin of 720 votes. If 20% of the total votes polled were de...
The average number of books sold by Viren in first 5 months is 3000 and in first 6 months is 3800. If the number of books sold by him in 7th ...
Relevant for Exams:
