Start learning 50% faster. Sign in now
Get Started with ixamBee
Start learning 50% faster. Sign in nowATQ, Let the speed of the stream be 'a' km/hr Therefore, speed of the boat in still water = 1.20 × a = '1.2a' km/hr Downstream speed of the boat = 1.2a + a = '2.2a' km/hr Upstream speed of the boat = 1.2a - a = '0.2a' km/hr According to the question, (176/2.2a) - (8/0.2a) = 4 Or, (80/a) - (40/a) = 4 Or, 4a = 40 Or, 'a' = (40/4) = 10 Therefore, downstream speed of the boat = 2.2a = 2.2 × 10 = 22 km/hr Upstream speed of the boat = 0.2a = 0.2 × 10 = 2 km/hr Required time taken = (264/22) + (16/2) = 12 + 8 = 20 hours
A and B can complete a work together in 36 days. If A alone can complete one-fourth of the work in ‘x’ days and remaining work is completed ...
X can work as fast as Y and Z together. X and Y together can finish the same task 3 times as fast as Z. If all three working together can finish the tas...
55 men can complete a piece of work in 18 days. ‘x’ men started the work and after 9 days 64 more men joined them so that whole work was finished in...
18 women can weave a carpet in 20 days. If 9 women started weaving the carpet and after 10 days ‘y’ more women joined them such that the remaining w...
A, B and C can complete the whole work in 20 days. A starts the work and works for ‘x’ days while B and C complete the remaining 3/5 of the ...
A can do 1/4th of a work in 15 days, B can do the 25% of the work in 20 days & C can do 1/5th of the work in 15 days. Who will complete the work fir...
A, B, and C can finish work in 5 days, 10 days, and 15 days, respectively, working alone. A and B work on the first day, A and C work on the second day,...