A boat takes half time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current is
2 : 1
1 : 2
4 : 3
4 : 3
D.
4 : 3
Let the speed of the boat in still water be x kmph.
Speed of current be y kmph.
∴ Rate downstream = (x + y) kmph
Rate upstream = (x - y) kmph
Distance = Speed x Time
∴ (x - y) x 2t = (x + y) x t
A tank has two pipes. The first and pipe can fill it in 4 hours and the second can empty it in 16 hours. If two pipes be opened together at a time, then the tank will be filled in
10 hours
6 hours
6 hours
A farmer travelled a distance of 61 km in 9 hours. He travelled partly on foot at the rate 4 kmph and partly on bicycle at the rate 9 kmph. The distance travelled on foot is
16 km
14 km
17 km
17 km
A man rows upstream 36 km and downstream 48 km taking 6 hours each time. The speed of the current is
0.5 kmph
2 kmph
1 kmph
1 kmph
On a certain principal, the compound interest compounded annually for the second year at 10% per annum is
₹ 1250
₹ 1000
₹ 1200
₹ 1200
Study the bar diagram and answer the given questions.
Ratio of highest and lowest marks obtained in first term among all the subjects is
7 : 9
9 : 7
10 : 7
10 : 7
Study the bar diagram and answer the given questions.
Average marks obtained by the students for all subjects in second term is
65
73
62
62
In an institution, there are 800 students, Students use different modes of transport for going to the institution and return. The given pie diagram represents the requisite data. Study the diagram carefully and answer the questions.
The number of students who travel in public bus is
150
120
130
130
In an institution, there are 800 students, Students use different modes of transport for going to the institution and return. The given pie diagram represents the requisite data. Study the diagram carefully and answer the questions.
The number of students who do not use Institute bus is
330
350
480
480
In an institution, there are 800 students, Students use different modes of transport for going to the institution and return. The given pie diagram represents the requisite data. Study the diagram carefully and answer the questions.
The number of students who go to institute on foot is
160
170
120
120