1181: A person travels from X to Y a speed of 40 kmph and returns by increasing his speed by 50%. What is his average speed for both the trips ?
(a) 36 kmph
(b) 45 kmph
(c) 48 kmph
(d) 50 kmph
1182: The Narmada river flows to the west, while most other large peninsular rivers flow to the east Why?
1. It occupies a linear rift valley.
2. It flows between the Vindhyas and the Satpuras.
3. The land slopes to the west from central India.
Select the correct answer using the codes given below.
(a) 1 only
(b) 1 and 3
(c) 2 and 3
(d) None
1183: Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of
1. Its escape into the outer strato-sphere.
2. The photosynthesis by phyto-plankton in the oceans.
3. The trapping of air in the polar ice caps
Which of the statements given above is/are correct?
(a) 1 and 2
(b) 2 only
(c) 2 and 3 only
(d) 3 only
1184: An accurate clock shows the time as 3.00. After hour hand has moved 135°, the time would be
(a) 7.30
(b) 6.30
(c) 8.00
(d) 9.30
1185: Jupiter completes one circuit of the Sun in
(a) 13 years
(b) 12 years
(c) 16 years
(d) 10 years