C-16-Q124mediumsingle_mcq

Two wheels make $32$ and $48$ revolutions to cover $211$ m $20$ cm. The difference of their radii is approximately —

a $0.18$ m
b $0.35$ m
c $0.70$ m
d $1.05$ m

ব্যাখ্যা

Each wheel's circumference is distance per revolution: $\frac{21120}{32}=660$ cm and $\frac{21120}{48}=440$ cm. From $2\pi r$ , the radii differ by $\frac{660-440}{2\pi}\approx 35$ cm $=0.35$ m.

এই অধ্যায়ের আরও প্রশ্ন

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Chapter 16: Mensuration — সব প্রশ্ন দেখুন (210টি) →

Two wheels make $32$ and $48$ revolutions to cover $211$ m $20$ cm. The difference of their radii is approximately —

0.18

0.35

0.70

1.05

ব্যাখ্যা

Each wheel's circumference is distance per revolution: $\frac{21120}{32}=660$ cm and $\frac{21120}{48}=440$ cm. From $2\pi r$ , the radii differ by $\frac{660-440}{2\pi}\approx 35$ cm $=0.35$ m.

Two wheels make 323232 and 484848 revolutions to cover 211211211 m 202020 cm. The difference of their radii is approximately —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

Two wheels make 323232 and 484848 revolutions to cover 211211211 m 202020 cm. The difference of their radii is approximately —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

Two wheels make $32$ and $48$ revolutions to cover $211$ m $20$ cm. The difference of their radii is approximately —

Two wheels make $32$ and $48$ revolutions to cover $211$ m $20$ cm. The difference of their radii is approximately —