alleryବାୟୁମଣ୍ଡଳୀୟ ବସ୍ତୁତ୍ୱର ପ୍ରାୟ କେତେ ଅଂଶ ଟ୍ରୋପୋସ୍ଫିୟରରେ ଅଛି?
A60 ପ୍ରତିଶତ
B80 ପ୍ରତିଶତ
C40 ପ୍ରତିଶତ
D20 ପ୍ରତିଶତ
Answer & Solution
Correct answer: B. 80 ପ୍ରତିଶତ
ଟ୍ରୋପୋସ୍ଫିୟର ପୃଥିବୀର ବାୟୁମଣ୍ଡଳର ମୋଟ ବସ୍ତୁତ୍ୱର ପ୍ରାୟ 80 ପ୍ରତିଶତ ଧାରଣ କରେ।
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