alleryStart learning →6 workers at equal fixed rates need 5 days at 4h/day. Same job: days for 4 workers at 6h/day?
A5 days
B7.5 days
C3⅓ days
D10 days
Answer & Solution
Correct answer: A. 5 days
The work needs 6 × 5 × 4 = 120 worker-hours; four workers provide 24 hours of labour daily, so five days suffice.
Keep practising Direct And Inverse Proportions
Browse all Direct And Inverse Proportions questions for ICSE Class 8, or explore more Mathematics topics.
Related questions
Can positive y vary both directly and inversely as positive x varies?A vehicle travels 60 km at 20 km/h, then 60 km at 30 km/h, with no stops. What is its averA fixed journey takes 1 hour longer at 40 km/h than at 60 km/h, with no stops. What is itsy is directly proportional to x. Increasing x from 4 to 10 increases y by 18. What is y whPositive pairs (a,b) and (c,d) satisfy b/a = d/c = k. Which new pair must have the same sePositive y varies directly with x, and z inversely with y. How does z vary with x?3 workers at equal fixed rates need 10 days. Same hours/day: fewest whole workers to finisA's fixed rate is twice B's; B needs 30 days alone. 2 A-type workers plus B work independe