২৬১১১
If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in 2 days , the time taken by 15 men and 20 boys to do the same type of work will be
উত্তর
4 days
২৬১১২
Pipe A alone can fill a tankin 8 hours.Pipe B can fill it in 6 hours. If both the pipes are operated and after 2 hours pipe A is closed, then the other pipe will fill the tank in.
উত্তর
1 1/2 hours
২৬১১৩
How many terms of Arithmetic Progression (A.P) 21, 18, 15, 12 ,..... must by taken to give the sum zero?
উত্তর
15
২৬১১৪
A train of length 150 m takes 10 seconds to cross another train 100 m long coming from the opposite direction. If the speed of first train is 30 km / hr, what is the speed of second train?
উত্তর
60 km / hr
২৬১১৫
In an acute angled traingle ABC ,if sin 2 (A + B - C) =1 and tan ( B + C-A)=3 , then the value of angle B is
উত্তর
52%
২৬১১৬
After being dropped a certain ball always bounces back to 2/5 of the height of its previuos bounce. After the first bounce it reaches a height of 125 inches. How high (in inches) will it reach after its fourth?
উত্তর
8
২৬১১৮
If m and p are positive integers and (m+p) m is even, which of the following must be true?
উত্তর
If m odded, then p is odd
২৬১১৯
∆ABC এর ∠B=40°, ∠C=60° এবং ∠B ও ∠C এর সমদ্বিখন্ডদ্বয় O বিন্দুতে মিলিত হলে, ∆BOCএর মান কত?
উত্তর
130°
২৬১২০
A pole 6m high cast a shadow 23m long on the ground, then the Sun's elevation is_____
উত্তর
60°