Our top 5% students will be awarded a special scholarship to Lido.

Ncert exemplar solutions

CHAPTERS

A multistory building has 25 floors above the ground level each of height 5 m. It also has 3 floors in the basement each of height 5m. A lift in the building moves at a rate of 1m/s. If a man starts from 50 m above the ground, how long will it take him to reach at 2^{nd} floor of the basement?

Each floor has a height of 5 m and a basement of 5 m each.

If a man starts from 50 m above ground and reached at 2^{nd} floor of the basement.

Distance traveled above basement =50 m

And below basement =2×5=10 m

Therefore, (50 + 10)m = 60 m

Rate of moving of a lift = 1m/s

Hence, time required by man to reach 2^{nd} floor of basement = 1× 60 = 60 seconds.

^{nd} floor of the basement?

Each floor has a height of 5 m and a basement of 5 m each.

If a man starts from 50 m above ground and reached at 2^{nd} floor of the basement.

Distance traveled above basement =50 m

And below basement =2×5=10 m

Therefore, (50 + 10)m = 60 m

Rate of moving of a lift = 1m/s

Hence, time required by man to reach 2^{nd} floor of basement = 1× 60 = 60 seconds.

Lido

Courses

Quick Links

Terms & Policies

Terms & Policies

2021 © Quality Tutorials Pvt Ltd All rights reserved