Question
x men can finish a work in y days. 0.9x women can finish
1/3rd of the same work in (y - 8) days. If 0.8x women can complete 1/3rd work in 36 days. Find 0.5x men can finish one-fourth of the same work in how many days?Solution
We can see that x is common in this question, so we will take x = 1 Now according to question, 1 M = y days---------(i) 0.9 W = 3 (y – 8) days -------(ii) 0.8 W = 36 × 3 = 108 days--------(iii) Now, equating equation (ii) and (iii) => 0.9 W × 3(y – 8) = 0.8 × 108 => y – 8 = 32 => y = 40 1 man can do a piece of work in 40 days 0.5 men can complete 1/4th of the work in 80/4 = 20 days
Two trains P and Q of lengths 250 m and 400 m, respectively, are running in the same direction on parallel tracks at 90 km/h and 120 km/h, respectively....
Two trains ‘T5’ and ‘U5’ of lengths 800 metres and 400 metres respectively are travelling towards each other. Ratio of speed of ‘T5’ to ‘U...
A person is walking at 6 m/sec in the same direction of a train. The train crosses him in 5 seconds. If speed of the train is 108 km/hr, find the time t...
A train with 10 compartments of equal length takes 20 seconds to cross a pole and 28 seconds to cross a 160-metre-long platform. If 4 compartments of th...
A boy is cycling at 10 m/sec in the same direction of a train. The train crosses him in 5 seconds. If speed of the train is 90 km/hr, find the time take...
Speed of two trains 'A' and 'B' is 18 m/s and ___ m/s respectively. Length of 'B' and 'A' is ___ metres and 360 metres, respectively. Time taken by the...
Train ‘A’ running with a speed of 126 km/hr can cross a standing goods train of 6 times its length in 30 seconds. Find the time taken by 200 metres ...
A train running with 90km/hr takes 25sec to cross a platform 250 m long. How much it take to cross a stationary train having length of 75m ?
Two trains X and Y are running in opposite directions. The speed of train X is x m/s and that of train Y is (x – 20) m/s. The lengths of trains X and ...
The speeds of train 'A' and 'B' are 12 m/s and 18 m/s, respectively. Whereas the lengths of train 'A' and 'B' are in the ratio 5:7, respectively. If th...