Three friends P, Q, and R share the cost of renting a storage unit. P stores goods weighing 300 kg for 4 months, Q stores 200 kg for 6 months, and R stores 400 kg for 3 months. If the total rent is Tk 840, how much should R pay as their share of rent?

Question: Three friends P, Q, and R share the cost of renting a storage unit. P stores goods weighing 300 kg for 4 months, Q stores 200 kg for 6 months, and R stores 400 kg for 3 months. If the total rent is Tk 840, how much should R pay as their share of rent?

Solution:
Here,
P : Q : R = (300 × 4) : (200 × 6) : (400 × 3)
= 1200 : 1200 : 1200
= 1 : 1 : 1

∴ R's rent = {840 × (1/3)}
= Tk 280