TGPSC HMWSSB Manager 2015 Paper 2 · Question 51
Question 51 of the TSPSC Manager (Engineering), HMWSSB, 2015: Paper 2 (Civil Engineering) (1 November 2015). Try it first, then open the answer and explanation.
The area between the two isohyets 45cm and 55cm is 100km² and that between 55cm and 65cm is 150km². What is the average depth of annual precipitation over the basin of 250km²
- 50cm
- 52cm
- 56cm
- 60cm
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Answer: (3) 56cm
By the isohyetal method each strip takes the mean of its bounding isohyets (50 cm and 60 cm), so P = (100 × 50 + 150 × 60)/250 = 14000/250 = 56 cm.