The cost of preparing a cricket ground of rectangular shape at 70 paisa per square meter is Tk. 420. Find the perimeter of the field if its sides are in the ratio of 3 : 2.

A 100m
B 50m
C 110m
D 600m

Correct Answer: 100m

ধরি, দৈর্ঘ্য 3x মিটার প্রস্থ মিটার ∴ ক্ষেত্রফল 6x2 বর্গমিটার শর্তমতে, 6x2 × 70 = 420 × 100 = 420 ⇒420x2 × 100 ⇒x2 = 100 ∴x = 10 ∴ পরিসীমা = 2(3x + 2) = 10x = 10 × 10 = 100
Bissoy MCQ
#গণিত #অনুপাত-সমানুপাত (Ratio-Proportion) #National Bank Ltd #National Bank Ltd - Probationary Officer - 22.05.2015

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