Syntel Company Numerical Ability Time and Work

Walking 6/7th of his usual speed, a man is 12 minutes too late. The usual time taken by him to cover that distance is:
1. 2 hour
2. 1 hr 12 min.
3. 1 hr 15 min.
4. 45 min

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Syntel Other Question

A contractor undertakes to complete a road 420 m long in 140 days and employ men for the work. After 70 days he finds that only 140 m of the road is made. How many men should the contractor employ more so that the work may be completed in time? Starting from his house one day, a student walks at a speed of 5/2 kmph and reaches his school 6 minutes late. Next day he increases his speed by 1 kmph and reaches the school 6 minutes early. How far is the school from his house?
1. 1 km
2. 15 km
3. 14 km
4. 3 km