Question

I) P is 40% more efficient than & R is 20% less efficient than Q
If all three of there can complete the whole work in 7 days
then how many days will P&Q together take to complete
75% of the work ?​

Answer 1

Step-by-step explanation:

P is 40% more efficient than Q,

⇒ Ratio of efficiency of P and Q = 7 : 5

R is 20% less efficient than Q

⇒ Ratio of efficiency of R and Q = 4 : 5

⇒ Ratio of efficiency of P, Q and R = 7 : 5 : 4

All three of them can complete the whole work in 7 days,

⇒ Total work = 7 × 16 = 112 units

Work done by P and Q in 1 day = 12 units

For 75% of the total work, P and Q together will take = 112/12 × 75/100 days = 7 days

i hope it's helpful