बाय व्हाट नंबर शोल्ड (1/ 5) टू द पावर 2बी मल्टीप्लाई टू शो दैट द प्रोडक्ट बीकॉम 20
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let the number be x
by the problem,
(1/5) to the power 2 × x = 20
(1/5)×(1/5) × x =20
(1/25) × x = 20
x = 20×25
x = 500
hence required number is 500
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