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Two persons A and B each of mass 60 kg a...

Two persons A and B each of mass 60 kg are carrying loads 15 kg each. If they reach the top of a building of height 10 m in 20s and 40s respectively, the ratio of their efficiencies is

A

`1 : 1`

B

`1 : 2`

C

`2 : 1`

D

`4 : 1`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Two person A and B each of mass 60kg are carrying loads 15kg each. If they reach the top of a building of height 10m in 20s and 40s respectively, the ratio of their efficiencies is

    A
    `1: 1`
    B
    `1: 2`
    C
    `2: 1`
    D
    `4: 1`

  • A man of mass 60 kg lifts a 15 kg mass to the top of a building of height 10m in 5 minutes. H is efficiency is

    A
    `10%`
    B
    `20%`
    C
    `30%`
    D
    `40%`

  • A man of mass 60kg lifts a 15 kg mass to the top of a building of height 10 m in 5 minutes. H is efficiency is

    A
    0.1
    B
    0.2
    C
    0.3
    D
    0.4

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