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The sentence is in the past tense ("noticed"), so the correct form for an action that was ongoing before that moment is the past perfect continuous tense ("had been doing"): As soon as she noticed the workmen, she asked them what they had been doing.
What is the time taken by a 540 m long train running at 72 km/h to cross a man standing on a platform?
Krishna covers a certain distance by train at 25 km/hr. and the equal distance on foot at 4 km/hr. If the time taken by him for the whole journey be 5 ...
A man travels a distance of 75 km in 11 hours such that he traveled partly on foot at a speed of 5 km/hr and the rest by car at a...
A was travelling from point X to point Y. He increased his speed by 14 km/h after every hour. He reached his destination in 18 hours. If his initial spe...
Which of the following can be true?
i. R reached the destination in 5hrs and P reached the destination in 3 hrs
ii. R reached the desti...
Walking 3/4 of his normal speed, Ravi was 21 minutes late in reaching his office. The usual time took to cover the distance between his home and office ...
A person travels at the speeds of 18kmph, 24kmph, and 12kmph on the surface of an equilateral triangle and the ground. Find the average speed of the ent...
If Anil covers a certain journey at 75% of his usual speed, he reaches his destination 53 minutes late. The usual time (in minutes) taken by him to rea...
Buses A and B are moving around a circular ground of radius 280 m. If the speeds of the buses A and B are 12 m/sec and 20 m/sec respectively, then what ...
A train overtakes two persons walking along a railway track. The first one walks at 3.2 Km/h. The other one walks at 4.5 Km/h. The train needs 5.5 and 5...
