Question
A boat can cover 72 km in still water and 60 km in
downstream in 4 hours and 3 hours respectively. Find the time taken by the boat to cover 60 km upstream and 70 km downstream.Solution
Speed of the boat in still water = 72/4 = 18 km/h Downstream speed of the boat = 60/3 = 20 km/h Speed of the stream = 20 – 18 = 2 km/h Upstream speed of the boat = 18 – 2 = 16 km/h Time taken to cover 60 km upstream and 70 km downstream = 60/16 + 70/20 = 3.75 + 3.5 = 7.25 hours
Answer the questions based on the information given below.
Nine persons G, K, M, F, H, J, I, N and L are there in the family of three generat...
Raj is the brother of Rishu. Karni is the sister of Ajay. Rishu is the son of Karni. How is Raj related to Ajay?
How N related to M?
How is N related to J?
How is V related to R?
How is R related to K?
Answer the questions based on the information given below.
There are seven members in a family (L, M, N, O, P, Q and R) which consists of three...
U is mother of B, who is brother of D. G is married to T and the couple has only two children. A is brother-in-law of C, who is unmarried and daughter ...
I is mother-in-law of K, who is married to father of S. N, who has only two children, is father of S and L. L is only granddaughter of P, who is father ...
Read the directions carefully and answer the following question.
L is the brother of Z. Z is mother of Q. B is sister of Q, who is the son of F...
