Question

3. A toy marked at Rs.40 is available for Rs.32. Then the percent discount
given on the marked price is
a.10%
b.20%
c.25%
d.40%
4. The ratio of 10m to 1 km is
a. 1:10
b.10:1
c.1:100
d.100:1
5. Top view of a right circular cone is
a. triangle b. circle
c. rectangle
d. square
6. The Curved Surface Area of a cylinder whose radius of the base and
height are equal to 1 unit is
a. I a sq.units b.21 sq.units c.31 sq.units d.47 sq.units
​

Answer 1

$3. Marked \: price \: of \: a \:toy (m.p) = Rs \:40$

$selling \:price (s.p) = Rs \: 32$

$Discount (d) = m.p - s.p \\= Rs \:40 - Rs \:32 \\= Rs \: 8$

$Discount \: percentage = \frac{d}{m.p} \times 100\\= \frac{8}{40} \times 100\\= \frac{100}{5} \\= 20\%$

$Option \pink { ( b) } \:is \: correct.$

_____________________________

$4. The \: ratio \: of \: 10\:m \:to \:1\:km \\= \frac{ 10\:m }{1\:km } \\= \frac{ 10\:m }{ 1000\:m }$

$\boxed { \pink { Since , 1\:km = 1000\: m }}$

$= \frac{1}{100} \\= \blue { 1 : 100 }$

Therefore.,

$Option \: \pink { ( c ) } \: is \: correct.$

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