Question

a multi storey building has 20 floors above the ground level each of height 5 metre . It has also 3 floors in the basement each of height 5 metre . A lift of building moves at a rate of 1 metre/sec . Dr Ritam resides at 10th floor from the ground . she wants to meet a friend residing at 2nd floor of basement . How long will it take to reach at 2nd floor of basement if she uses the lift ?

Answer 1

heya.....


given,

1 floor =5m20 floor =25 mbasement 3 floor =60mlift travel at speed of 1m/s1 mins=60 metresnow lift have to move from 10 metres above and 2 floor in basement =10+(2×5)=20 m20 m is the totall lenght that lift should travelit travel at speed of 1m per sso, 20× 1 =20 sec= 0.3 minutein 1 minute lift can cover whole distance 





tysm.#gozmit

Answer 2

Heyaaaa Friend.........

1 floor = 5 m
3 floors = 5 m each
= 10 + (2+×5) = 20m
Speed travel 1m per sec 20×1=20
sec = 0.3
1min lift can cover the whole dis.

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