time and work Model Questions & Answers, Practice Test for ibps rrb clerk asst multipurpose prelims 2024
ibps rrb clerk asst multipurpose prelims 2024 SYLLABUS WISE SUBJECTS MCQs
Number System
Lcm & Hcf
Simplification
Percentage
Time & Work
Time & Distance
A volcanic crater (conical) has a base diameter 125 m and is 10 m deep. It rains very heavily and the crater gets filled up in 4 hours. Find the rate of water flow in the crater.
Answer: (b)
Volume of the cone = $1/3 × π R^2 H = 1635.4 m^3$
⇒ Rate of water flow = ${1635.4}/4 = 408m^3$/hr
or 408000 litres/hour
A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger ?
Answer: (b)
Speed of train relative to jogger
= (45 – 9) km/h = 36 km/h
= $(36 × 5/{18})$ m/sec = 10 m/sec.
Distance to be covered = (240 + 120) m = 360 m.
∴ Time taken = $({360}/{10})$ sec = 36 sec.
20 workers working for 5 h per day complete a work in 10 days. if 25 workers are employed to work 10 h per day, what is the time required to complete the work ?
Answer: (b)
$M_1 D_1 T_1 = M_2 D_2 T_2$
Here $M_1 = 20 , D_1 = 10, T_1 = 5h, M_2 = 25, D_2$
= ?, $T_2$ = 10 h
⇒20 × 10 × 5 = 25 × $D_2$ × 10
∴ $D_2 = {20 × 10 × 5}/{25 × 10}$ = 4 days
A train covered a certain distance at a uniform speed. If the train had been 6 km/h faster, then it would have taken 4 hours less than the scheduled time. And, if the train were slower by 6 km/h, then the train would have taken 6 hours more than the scheduled time. The length of the journey is
Answer: (b)
Let the length of the journey be x km.
Suppose speed of the train be y km/h.
∴ Time taken to cover x km = $x/y$ hours
∴ $x/{y + 6} = x/y - 4, x/{y - 6} = x/y + 6$
Solving these equations, we get
y = 30, x = 720.
∴ Length of the journey = 720 km.
A and B working together can finish a piece of work in 12 days while B alone can finish it in 30 days. In how many days can A alone finish the work?
Answer: (c)
A and B together can do in = 12 days
B alone can do in = 30 days
A can do in
= $1/{12} - 1/{30} = 3/{60} = 1/{20}$ i.e. 20 days
ibps rrb clerk asst multipurpose prelims 2024 IMPORTANT QUESTION AND ANSWERS
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Top Aptitude Time & Distance Questions PDF: IBPS RRB Clerk »
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IBPS RRB Clerk 2024: Number System Questions and Answers »
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IBPS RRB Clerk 2024: Aptitude Simplification Questions PDF »
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IBPS RRB Clerk 2024 Aptitude Percentage Questions Test PDF »
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IBPS RRB Clerk Prelims 2024: LCM & HCF Questions, Answers »
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Top Aptitude Time & Work Questions: IBPS RRB Clerk 2024 »
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