Mensuration Ques 40
Question
The base of a triangular field is 660 metres and height 440 metres. If the charges for watering the field are at the rate of Rs. 26.5 per square hecto metre, find the total cost to water the triangular field. (In Rs.)
(1) 385.75
(2) 387.91
(3) 384.78
(4) 383.20
(5) 353.67
(IBPS RRBs Officer CWE (Prelim Exam) 17.08 .2019)
Show Answer
Correct Answer: (3)
Solution: (3)
Area of triangular field $=\left(\frac{1}{2} \times 660 \times 440\right)$ sq. metre
$=145200$ sq. metre
$\therefore$ Cost of irrigation $=$ Rs. $\left(\frac{145200 \times 26.5}{10000}\right)$ $=$ Rs. $\left(\frac{3847800}{10000}\right)$ $=$ Rs. 384.78
BETA
