৫৬১২
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
৫৬১৩
A rope, 40 m long, is tightly stretched and tied from the top of a vertical pole to the ground. Find the height of the pole if the angle made by the rope with the ground level is 45°.
উত্তর
20√2 m
৫৬১৪
Two ships are sailing in the sea on the two sides of the lighthouse. The angles of elevation of the top of the lighthouse observed from the ships are 30° and 60°, respectively. If the lighthouse is 60 m high, what is the distance between the two ships?
উত্তর
80√3 m
৫৬১৬
An observer who is 1.5 meters tall is standing 10√3 meters away from a flagpole. If the angle of elevation from his eye to the top of the flagpole is 30°, what is the height of the flagpole?
উত্তর
11.5 m
৫৬১৮
What is the difference between the amount of interest earned on a principal of Tk. 100 for 2 years at 10% simple interest rate and 10% compounding interest rate?
উত্তর
Tk. 1
৫৬১৯
If 0 < x ≤ 1, then which one of the following is the maximum value of (x - 1)2 + x?
উত্তর
1
৫৬২০
একটি আয়তাকার বাগানের দৈর্ঘ্য ২৩ মিটার এবং গ্রন্থ ১৭ মিটার হলে বাগানের পরিসীমা কত?
উত্তর
৮০ মিটার