3
CHAPTER Time and Work
MCQ TYPE QUESTIONS 5. Ananth takes 6 hours and Bharath takes 4 hours
to read a book. Both started reading copies of the
2016 book at the same time. After how many hours is
1. P. Q, R and S are working on a project. Q can the number of pages to be read by Ananth, twice
finish the task in 25 days, working alone for that to be read by Bharath? Assume Ananth and
12 hours a day. R can finish the task in 50 days, Bharath read all the pages with constant pace.
working alone for 12 hours per day. Q worked (a) 1 2
12 hours a day but took sick leave in the
beginning (c) 3 (d) 4
for two days. R worked 18 hours a day on all
days.
What is the ratio of work done by Q and R after
7 days from the start of the project?
2015
6. An electric bus has onboard instruments that
(a) 10:11 (6) 11:10 report the total electricity consumed since the
(c) 20:21 (d) 21:20 start of the trip as well as the total distance
2. S, M, E and F are working in shifts in a team to covered. During a single day of operation, the bus
finish a project. M works with twice the efficieney travels on stretches M, N, O and P, in that order.
of others but for half as many days as E worked. S The cumulative distances travelled and the
and M have 6 hour shifts in a day whereas E and F
corresponding electricity consumption are shown
have 12 hours shifts. What is the ratio of in the table below.
contribution of M to contribution of E in the project?
(a) 1:1 (6) 1:2 StretchComulative Electricity
distance(km) | used (kWh) |
(c) 1:4 d) 2:1 M 20 12
3. It takes 10 s and 15 s, respectively, for two trains N 45 25
travelling at different constant speeds to
75 45
completely pass a telegraph post. The length of
the first train is 120 m and that of the second P 100 57
train is 150 m. The magnitude of the difference
The stretch where the electricity consumption
in the speeds of the two trains (in m/s) is
per km is minimum is
(a) 2.0 (6) 10.0
(a) M
(c) 12.0 (d) 22.0
(b) N
4. The velocity V of a vehicle along a straight line is
measured in m/s and plotted as shown with (c) O
respect to time in seconds. At the end of the (d) P
7 seconds, how much will the odometer reading
increase by (in m) ? 2014
7. It takes 30 minutes to empty a half-full tank by
draining it at a constant rate. It is decided to
simultaneously pump water into the half-full tank
while draining it. What is the rate at which water
has to be pumped in so that it gets fully filled in
10 minutes?
(a) 4 times the draining rate
Time(
6) 3 times the draining rate
(c) 2.5 times the draining rate
(a)0 (b) 3 (d) 2 times the draining rate
(c))4 (d) 5
CHAPTER Time and Work
MCQ TYPE QUESTIONS 5. Ananth takes 6 hours and Bharath takes 4 hours
to read a book. Both started reading copies of the
2016 book at the same time. After how many hours is
1. P. Q, R and S are working on a project. Q can the number of pages to be read by Ananth, twice
finish the task in 25 days, working alone for that to be read by Bharath? Assume Ananth and
12 hours a day. R can finish the task in 50 days, Bharath read all the pages with constant pace.
working alone for 12 hours per day. Q worked (a) 1 2
12 hours a day but took sick leave in the
beginning (c) 3 (d) 4
for two days. R worked 18 hours a day on all
days.
What is the ratio of work done by Q and R after
7 days from the start of the project?
2015
6. An electric bus has onboard instruments that
(a) 10:11 (6) 11:10 report the total electricity consumed since the
(c) 20:21 (d) 21:20 start of the trip as well as the total distance
2. S, M, E and F are working in shifts in a team to covered. During a single day of operation, the bus
finish a project. M works with twice the efficieney travels on stretches M, N, O and P, in that order.
of others but for half as many days as E worked. S The cumulative distances travelled and the
and M have 6 hour shifts in a day whereas E and F
corresponding electricity consumption are shown
have 12 hours shifts. What is the ratio of in the table below.
contribution of M to contribution of E in the project?
(a) 1:1 (6) 1:2 StretchComulative Electricity
distance(km) | used (kWh) |
(c) 1:4 d) 2:1 M 20 12
3. It takes 10 s and 15 s, respectively, for two trains N 45 25
travelling at different constant speeds to
75 45
completely pass a telegraph post. The length of
the first train is 120 m and that of the second P 100 57
train is 150 m. The magnitude of the difference
The stretch where the electricity consumption
in the speeds of the two trains (in m/s) is
per km is minimum is
(a) 2.0 (6) 10.0
(a) M
(c) 12.0 (d) 22.0
(b) N
4. The velocity V of a vehicle along a straight line is
measured in m/s and plotted as shown with (c) O
respect to time in seconds. At the end of the (d) P
7 seconds, how much will the odometer reading
increase by (in m) ? 2014
7. It takes 30 minutes to empty a half-full tank by
draining it at a constant rate. It is decided to
simultaneously pump water into the half-full tank
while draining it. What is the rate at which water
has to be pumped in so that it gets fully filled in
10 minutes?
(a) 4 times the draining rate
Time(
6) 3 times the draining rate
(c) 2.5 times the draining rate
(a)0 (b) 3 (d) 2 times the draining rate
(c))4 (d) 5
