Question

Multi storey building has 15 floors above the ground level each of height 9 m. it also has two floors in the basement each of the height 6 m . I lift in the building moves of at the rate of 2 m/s. if a man starts from 90m above the ground level , how long does it take for him to reach at the first floor of the basement?

Answer 1

Answer:

48 Second

Step-by-step explanation:

• The number of Floors above the ground            15
• The number of Floors below the ground              2
• The height of each floor that is above the ground             9 m
• The height of each floor that is below the ground             6 m

∴ If a man is 90 m above ground and he wants to go 1 floors below ground

Then he has to travel

⇒ 90 m + (1 × 6 m)

⇒ 90 m + 6 m

⇒ 96 m

So if it takes 1 second to cover 2 meter then

⇒ 96 m × 2 m/s

⇒ 48 sec

∴ it takes him 48 second reach the basement

Answer 2

Answer:

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