Formula for Solving Chain Rule Easily
m - Men/labour
d - Days
t - Time
w - part of work done/ wages
a - Amount earned
f - Food consumed/Milk used/coal required Machines/Diesel required for pumps.
Chain Rules Examples
Question 1: A machine weaves 0.75 meter of cloth every second. Approximately, how many seconds will it take for the weave 20 meters of cloth?
Solution:
= 0.75 m , = 20 m
= 1 s , = ?
= sec
Question 2: 30 men can complete a piece of work in 15 days. In how many days will 25 men complete the same work?
Solution:
= 30 , = 25
= 15 days , = ?
= 18 days
Question 3: 12 boys, working 3 hours a day can complete a work in 20 days. How many hours a day must 18 boys work to complete the same work in 10 days?
Solution:
= 12 , = 18
= 3 Hrs , = ?
= 21 days , = 10 days
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