Let the cost price of 1st mobile phone be Rs. ‘x’. Then, cost price of 2nd mobile phone = Rs. (750 – x) x × 120% = (750 – x) × 80% 120x = 60000 – 80x 120x + 80x = 60000 200x = 60000 x = 300 So, cost price of 1st mobile phone = Rs. 300
Ratio of the lengths of two trains ‘X’ and ‘Y’ is 6:7 respectively and the ratio of time taken by them to cross a pole is 4:5 respectively. If s...
Shatabdi express leaves Delhi Junction at a certain time. After 5 hours, Garib Rath leaves the same station and travels in the same direction at a speed...
Train P travelling at 50 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 40 km/hr in 14 seconds...
Train A, moving at a speed of 90 km/h, passes a stationary pole in 9.4 seconds. When encountering Train B, which is traveling towards it at a speed of 5...
A train can cross a pole, a bridge of 720 meter long and platform of 640 meter long in 9 seconds, _____ seconds and 25 seconds, respectively.
The...
Train ‘A’ running with a speed of 63 km/hr can cross a standing goods train of 4 times its length in 24 seconds. Find the time taken by 150 metres l...
Trains 'M' and 'N' travel at speeds of 72 km/h and 90 km/h, respectively. It takes train 'M' 32 seconds to pass a certain platform, while train 'N' requ...
A train can cross a pole in 33 seconds. While if the train increased its speed by 40% then time taken by it to cross 387 metres long platform is 42 seco...
Train ‘A’ travelling with a speed of 75 km/h can cross a pole in 15 seconds. If the length of train ‘B’ is 24% less than that of train ‘A’ a...
Two trains, A and B, cross each other in 15 seconds and 35 seconds respectively, when running in opposite and the same direction respectively. If the sp...
