Question

Janshakti Constructions Limited undertakes to construct a road 1000 metres long in 50 days. It initially uses 56 road-rollers and finds at the end of 27 days that
only 448 metres of the road has been built. How many more road-rollers must be used so that the work may be finished on schedule?​

Answer 1

The more road rollers that must be used to finish the work on schedule = 25

Step-by-step explanation:

Remaining road length = 1000 - 448 = 552

Remaining days = 50 - 27 = 23

56 road rollers construct in 27 days road length = 448 m

1 road roller will construct in 27 days road length = 448/56 = 8 m

1 road roller will construct in 1 day road length = 8/27 m

8/27 m road is constructed in 1 day by road rollers = 1

1 m road is constructed in 1 day by road rollers = 27/8

552 m road is constructed in 1 day by road rollers = 27/8 × 552 = 1863

552 m road is constructed in 23 days by road rollers = 1863/23 = 81

Extra road rollers required = 81 - 56 = 25

Hope this answer is helpful

Know More:

Q: A contractor undertakes to build a wall 1000 meter long in 50 days. He employed 56 men but at the end of 27 days he finds that only 448 meter of wall is build. How many extra men must the contractor employ so that the wall is completed in time .

Click Here: https://brainly.in/question/84106