৮৩১২
∠ M and ∠ N are complementary to each other. If ∠ M = 20° + 4x and ∠ N = 6x, find the value of ∠ N.
উত্তর
42°
৮৩১৫
In a class, 30 students play basketball, 20 students play volleyball, and 8 students play both. 12 students play neither basketball nor volleyball. What is the total number of students in the class?
উত্তর
54
৮৩১৬
In a mixture of milk and water, the ratio is 7 : 5. If 6 liters of water is added, the new ratio becomes 7 : 6. What was the original amount of milk in the mixture?
উত্তর
42 liters
৮৩১৭
A worker union contract specifies a 6% salary increase plus a Tk. 450 bonus for each worker. For a worker, this is equivalent to an 8% salary increase. What was this worker's salary before the new contract?
উত্তর
Tk. 22500
৮৩১৮
Find the greatest number that exactly divides each of the numbers 48, 72, and 108.
উত্তর
12
৮৩১৯
A ladder is leaning against a wall. It makes a 60° angle with the wall. If the distance between foot of ladder and wall is 7.5 meters, find the length of the ladder.
উত্তর
15 m