Question

2. The daily wages of a worker increases by 20%,but the number of hours worked by him perweek drops by 20%. If he was originally getting500 per week, how much will he get now?​

Answer 1

Rs 480

Step-by-step explanation:

let originally his wage was Rs 'x'/wk & he worked for y hrs/wk

work done is same in both cases with different Efficiencies

xy/500 = 6/5 * x × 4/5 * y / K

K = 500×6×4/ 25 = Rs 480

Trick :

% change =20 -20+(20)×(-20)/100 = - 4 %

- ve means it is decreased by 4% .

he will get = 500 - 4% of 500

= Rs 480