AP Police SI previous year question
P, Q, R complete a work alone in 20, 15, 12 days. Q and R start and leave after the 3rd day. Days needed for P to finish the remaining work is
Asked in AP Police SI Prelims: 2023 (Paper I & II) · Quantitative Aptitude
Tap an option to check your answer.
Show answer and explanation
Correct answer: (B) 11
Q+R rate = 1/15+1/12 = 3/20/day. In 3 days: 9/20 done, 11/20 remains. P's rate=1/20/day → days = 11.
---
हिंदी में प्रश्न
P, Q, R अकेले एक कार्य को क्रमशः 20, 15, 12 दिनों में पूरा करते हैं। Q और R कार्य शुरू करते हैं और तीसरे दिन के बाद कार्य छोड़ देते हैं। शेष कार्य पूरा करने के लिए P को आवश्यक दिनों की संख्या है
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 11
Q+R की दर = 1/15+1/12 = 3/20 प्रतिदिन। 3 दिनों में: 9/20 कार्य पूर्ण, 11/20 शेष। P की दर=1/20 प्रतिदिन → दिन = 11।
More solved Quantitative Aptitude questions
- Pipe B fills a tank 5 hrs faster than A and 4 hrs slower than C. Time for A and C together to fill the tank equals time for B alone. Time…
- A finishes a task alone in 25 days (12 hrs/day); B in 50 days (12 hrs/day). B starts, A joins after 2 days. B works 18 hrs/day, A works 12…
- 5 men build a wall in 20 days, 8 women in 25 days, 10 boys in 30 days. Time (days) for 2 men, 6 women, 5 boys together is
- A person travels 12 km at initial speed, then 6 km at speed ½ kmph faster. Travelling the entire distance at the increased speed would…
- Equal amounts given to A and B. After 3 years, A repays at 10% SI, B at 10% CI annually. Difference in amounts paid is Rs.46.50. The…
- X borrowed money at SI: 6% p.a. (first 3 yrs), 9% p.a. (next 5 yrs), 13% p.a. (beyond 8 yrs). Total interest at end of 11th year is…