It takes 3 mins to go both from ground floor to 7th floor and from 7th floor to ground floor using lift and . If a person goes up and down 10 times in total, then how many seconds did he spend in the lift?

1800 secs

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1820 secs

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2100 secs

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1700 secs

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Solution

The correct option is A 1800 secs
It is told that it takes 3 mins to go up and 3 mins to go down.
A person is told to go up and down the lift 10 times in total.
So, the number of minutes spent in the lift = 10 × 3 = 30 mins.

Also, 1 min = 60 secs.
$∴$ 30 mins = 30 × 60 = 1800 secs

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It takes 3 mins to go both from ground floor to 7th floor and from 7th floor to ground floor using lift and . If a person goes up and down 10 times in total, then how many seconds did he spend in the lift?

The correct option is A 1800 secsIt is told that it takes 3 mins to go up and 3 mins to go down. A person is told to go up and down the lift 10 times in total. So, the number of minutes spent in the lift = 10 × 3 = 30 mins. Also, 1 min = 60 secs. ∴ 30 mins = 30 × 60 = 1800 secs

The correct option is A 1800 secs
It is told that it takes 3 mins to go up and 3 mins to go down.
A person is told to go up and down the lift 10 times in total.
So, the number of minutes spent in the lift = 10 × 3 = 30 mins.

Also, 1 min = 60 secs.
$∴$ 30 mins = 30 × 60 = 1800 secs