১২৯২১
The average of two numbers is 62. if 2 is added to the smaller number, the ratio between the numbers becomes 1 : 2. The smaller number is -
উত্তর
40
১২৯২২
The present ratio of students to teachers at a certain school is 30 to 1. If the student enrollment were to increase by 50 students and the number of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
উত্তর
15
১২৯২৩
At present, father's age is 4 times more than that of his son. 6 years ago father's age was 10 times more than that of his son. What is their present age?
উত্তর
36 and 9 years
১২৯২৬
A ladder 20 meters long leans against a vertical wall. If the ladder makes an angle of 60 degrees with the ground, what is the distance of the foot of the ladder from the wall?
উত্তর
10 meters
১২৯২৮
A pole 90 meters long breaks into two parts without complete separation and makes an angle of 30° with the ground. Find the length of the broken part of the pole.
উত্তর
60 meters
১২৯৩০
A person 1.8 meters tall sees the top of a tree in a small mirror placed on the ground. The mirror is 1 meter away from the person's feet and 150 meters away from the base of the tree. What is the height of the tree?
উত্তর
270 meters