Explanation

Explanation

15 men × 10 days = M2 × 3 days

M2 = 50

More men = 50 - 15 = 35

Last verified on 08-03-2026

Explanation

Step 1: Multiply the number of students in each class by their pass percentage

- Class 1: 10 students × 20% = 2 passed  

- Class 2: 20 students × 30% = 6 passed  

- Class 3: 30 students × 60% = 18 passed  

- Class 4: 40 students × 100% = 40 passed  

Step 2: Add total passed students and total students

- Total passed = 2 + 6 + 18 + 40 = 66  

- Total students = 10 + 20 + 30 + 40 = 100

Step 3: Calculate the overall percentage

Pass % = (66 / 100) × 100 = 66%

Explanation

The mean proportional between two numbers a and b is √(ab).

So, √(2 × 8) = √16 = 4.

Explanation

1 hour's work of A = 2.5% (meaning A completes 2.5% of the work in 1 hour)

1 hour's work of B = 1.66% (meaning B completes 1.66% of the work in 1 hour)

Combined work rate of A and B in 1 hour = 2.5% + 1.66% = 4.16%

Time to complete the work = 100%/4.16% = 24 hours (since they work 8 hours a day, this is equivalent to 3 days)

So, A and B together can complete the work in 3 days, working 8 hours a day.

Explanation

We are given:

220% of X = 44  

→ (220/100) × X = 44  

→ (11/5) × X = 44  

→ X = 44 × (5/11) = 20

Now, find 44% of X:

→ (44/100) × 20 = 8.8

Explanation

Given:  

P * Q = P + Q + P / Q

Put P = 8, Q = 2

Now calculate:  

= 8 + 2 + 8 ÷ 2  

= 10 + 4  

= 14

Explanation

Given:  

a/3 = b/2

Cross-multiply:  

2a = 3b → a = (3b)/2

Now plug this value of a into the expression:

(2a + 3b) / (3a - 2b)  

= [2(3b/2) + 3b] / [3(3b/2) - 2b]  

= (3b + 3b) / (9b/2 - 2b)  

= 6b / [(9b - 4b)/2]  

= 6b / (5b/2)  

= 6b × (2/5b) = 12/5

Explanation

cos 60° = adjacent side / hypotenuse

= 4.6 / length of ladder

1/2 = 4.6 / length

length = 4.6 × 2

= 9.2 m

Explanation

3x:2X

3X=2X+5 3

X-2X=5

X=5

Age of younger one is 2X

 X is 5 that is equal to 5×2=10

ND11-3-2023

SH25-8-2023