Question
A alone can assemble 40 mobile phones in 10 hours, while
B alone can assemble the same number in 15 hours. Working together, in how many hours can A and B assemble 120 mobile phones?Solution
A’s rate = 40 / 10 = 4 phones/hour B’s rate = 40 / 15 = 8/3 phones/hour Combined rate = 4 + 8/3 = 20/3 phones/hour Time for 120 phones = 120 ÷ (20/3) = 120 × 3 / 20 = 18 hours
How many persons are sitting between H and J when counted to the left of H?
What is the position of K with respect to the one whose weight is 51kg, when counted anticlockwise?
Six friends Q, N, X, S, R and T are sitting in a row facing north. N and S are adjacent to each other and neither of them is on extreme end. T is sittin...
Who among the following person sits immediate right of A?
Which of the following statements is not correct?
Seven persons M, N, O, P, Q, R and S sit in a linear row but not necessarily in the same order. Each of them faces towards the north. R sits second from...
How many person sit between tallest person and shortest person?
Who among the following doesn’t face same direction as T?
I. V
II. U
III. B
In a row of girls, Nisha is 16th from the front and in the same row Urmila is 12 from the bottom. If they interchange their positions, then N...
How many persons are sitting around the circular table?
Relevant for Exams:
