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ICSE Class 10 Physics 2016 Solved Paper

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A boy weighing 40‌kg climbs up a stair of 30 steps each 20‌cm high in 4 minute and a girl weighing 30‌kg does the same in 3 minutes. Compare:
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Question : 3
Total: 73
The work done by them.
Solution:  
Given : m1=40‌kgf,m2=30‌kgf,h1= h2,t1=4 minutes =4×60 sec.,t2=3 minutes =3×60 sec.
Comparing work done by them :
‌
‌ Work done by a boy ‌
‌ Work done by a girl ‌
‌=‌
m1gh1
m2gh2

‌=‌
m1
m2
=‌
40
30

‌=4:3
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